Transporting (External) for Your Volkswagen California Van Third Generation (2015-2024)

1. Tap APP in MirrorLink mode to open theApp-Connect main menu.  
Or: Tap to open the MirrorLink® main menu.  
2. Tap to terminate the active connection.  
Things to note  
The following points need to be noted during an activeMirrorLink connection:  
An active MirrorLink device can also be connected simultaneously to the Infotainment system via Bluetooth.  
If the MirrorLink device is connected to the Infotainment system via Bluetooth, the telephone function on the  
Infotainment system can also be used.  
An active MirrorLink® device cannot be used as a media device in theMedia main menu.  
You can view information about telephone mode in the instrument cluster display.  
No turning instructions or media mode displays are shown on the instrument cluster display.  
You can accept or reject incoming calls or end a telephone call via the multifunction steering wheel.  
Function buttons in MirrorLink mode  
Goes back to the App-Connect main menu. Here you can stop theMirrorLink connection, connect a different  
mobile telephone or select a different technology.  
Close open apps. TapClose all to close all open apps.  
Display the mobile telephone screen on the Infotainment system screen.  
Open the MirrorLink settings.  
Return to the MirrorLink main menu.  
Information on technical requirements, compatible mobile telephones, certified apps and availability can be  
found on the Volkswagen Commercial Vehicles and MirrorLink websites, and is also available from your  
Volkswagen Commercial Vehicles dealership.  
Stowing a load  
Always observe legal requirements.  
You can transport a load in the load compartment or on the load bed, on a trailer and on a roof load carrier .  
Stowing a load securely  
Always distribute any loads in the vehicle as evenly as possible.  
Always stow loads and heavy objects in the load compartment and place them as far forwards as possible  
If necessary, remove the seats to increase the size of the load compartment.  
.
Observe gross axle weight ratings and the gross vehicle weight rating .  
Secure items in the load compartment to the fastening rings using suitable lashing, retaining and securing straps  
(→ Luggage compartment equipment).  
Also stow small objects safely.  
If necessary, fold back the rear seat backrest and engage it securely.  
If necessary, adjust the headlight range .  
442  
Adjust the tyre pressure to suit the load. Observe the tyre pressure sticker (→ Tyre pressure).  
If necessary, adapt the tyre monitoring system to the new load level .  
Using securing straps  
Follow the instructions for the securing straps.  
Observe specifications for maximum load rating.  
The securing straps must be long enough for the item you wish to secure.  
Damaged securing straps  
Never use the securing straps if:  
Damage to the warp and weft of the webbing(cuts or fraying) accounts for more than 10 % of the webbing.  
The seams are damaged.  
The webbing is deformed by friction or heat.  
The securing straps are cracked, especially if cracked across the strap, or if the straps have notches.  
The securing straps have splits or corrosion damage.  
There is damage to the tightening device and connection elements.  
WARNING  
Objects that are not secured or are attached incorrectly can cause serious injuries in the event of a sudden driving or  
braking manoeuvre or in an accident. This applies particularly if objects are struck by the airbag when activated and  
then flung through the vehicle interior. To reduce the risk of accidents, observe the following guidelines:  
Always stow all items securely in the vehicle.  
Stow items in the vehicle interior in such a way that they can never enter the airbag deployment zones while the  
vehicle is in motion.  
Always keep stowage compartments closed while the vehicle is in motion.  
Stowed objects must never cause passengers to assume an incorrect sitting position.  
Any seat blocked by stowed objects must not be used by any passengers.  
Do not stow any hard, heavy or sharp objects loose in any of the vehicle’s open stowage areas, on the surface of  
the rear seat backrest when it is folded down, the load compartment cover or the dash panel.  
Always stow heavy objects directly on the load compartment floor.  
Remove any hard, heavy or sharp objects from items of clothing and bags inside the vehicle and stow them  
securely.  
WARNING  
Transporting heavy objects changes the vehicle's handling due to the change in the centre of gravity and increases  
the braking distance. Heavy loads that are not properly stowed or secured in the vehicle can lead to a loss of vehicle  
control and serious injuries can be caused.  
Never overload the vehicle. Both the payload and the distribution of the load in the vehicle will have an effect on  
the driving response and braking distance of the vehicle.  
Transporting heavy objects changes the vehicle's handling and the centre of gravity.  
Always distribute the load evenly and as low down as possible in the vehicle.  
Always stow heavy items securely in the load compartment as far as possible in front of the rear axle.  
Loose objects in the load compartment can suddenly slide and change the way the vehicle handles.  
Always adapt your speed and driving style to the current visibility, weather and road or traffic conditions.  
Accelerate particularly carefully and gently.  
Avoid sudden braking and driving manoeuvres.  
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Brake earlier than usual.  
WARNING  
Lashing, retaining or securing straps that are incorrectly fastened, unsuitable or damaged may become detached in  
the event of a sudden braking manoeuvre or accident. This could cause objects to be flung through the interior and  
lead to severe or fatal injuries.  
Always use suitable and undamaged lashing, retaining or securing straps.  
Attach lashing, retaining or securing straps securely to the fastening rings.  
Load the fastening rings evenly.  
Never fix lashing, retaining or securing straps between the fastening rings in the side panel and the fastening  
rings in the vehicle floor.  
Never fix lashing, retaining or securing straps between opposite side walls.  
Never load the lashing, retaining or securing straps beyond their load rating.  
If necessary, observe the information sign on the side trim.  
Never use elastic straps or nets to tie down loads.  
Ensure that the load retains its form and position once it has been secured. Use sturdy packaging and anti-slip  
mats.  
WARNING  
When the vehicle is not in use or is not being supervised, always lock the doors to reduce the risk of severe or fatal  
injuries.  
Never leave children unattended, particularly when the boot lid is open. Children could make their way into the  
load compartment, close the boot lid and be unable to get out. This can cause severe or fatal injuries.  
Never let children play in or around the vehicle.  
Never transport people in the load compartment.  
NOTICE  
Items that rub against the rear windows can damage or destroy the heating wires.  
Appropriate retaining straps, securing straps and load securing systems are available from correspondingly  
qualified workshops.  
Luggage compartment cover  
The luggage compartment cover is attached to the three-seat bench backrest.  
Fig. 1 In the luggage compartment: Luggage compartment  
cover pulled out.  
Attaching luggage compartment cover  
444  
1. Adjust the backrest of the 3-seat bench to an upright position.  
2. Pull evenly on the two handle recesses to slide the luggage compartment cover backwards.  
3. Hook the luggage compartment cover in at the sides.  
Detaching luggage compartment cover  
1. Using the handle recesses, pull the luggage compartment cover backwards slightly.  
2. Hold the luggage compartment cover securely and remove it upwards from the side retainers.  
3. Guide the luggage compartment cover forwards by hand.Do not let it snap back.  
Fig. 2 In the luggage compartment: Mountings for the  
luggage compartment cover.  
Fitting the luggage compartment cover  
1. Insert the hook on the luggage compartment cover into the retainer on one side.  
1
2. Push the other side of the luggage compartment cover inwards→ Fig. 2  
.
2
3. Push the luggage compartment cover with the hook forwards and press into the retainer→ Fig. 2  
.
4. Check that the luggage compartment cover is securely installed→  
.
Removing the luggage compartment cover  
2
1. Pull luggage compartment cover with the hook to the rear and remove from the retainer→ Fig. 2  
1
.
2. Pull the other side of the luggage compartment cover outwards→ Fig. 2  
.
WARNING  
Objects that are not secured or are secured incorrectly, or animals on the luggage compartment cover, could cause  
serious injuries in any sudden driving or braking manoeuvre or accident.  
Never transport any objects on the luggage compartment cover.  
Never transport any animals on the luggage compartment cover.  
NOTICE  
To prevent damage to the luggage compartment cover, do not load the luggage compartment to such a height that  
the load will press against the luggage compartment cover when the boot lid is closed.  
445  
Installing and removing the net partition  
Fig. 1 Folding out the net partition  
1
2
3
Retainers with T-shaped ends which are inserted in mounts in the headliner.  
Holder straps with T-shaped holders which are secured in the seat rails  
Cross pieces with joints which lock into place  
The net partition can prevent objects in the luggage compartment entering the passenger compartment.  
The net partition can be fitted behind the front seats or behind the 3-seat bench.  
Preparing the net partition for fitting  
1. Take the net partition out of its plastic bag and unroll it fully.  
2. Fold out all the side rods fully, until you hear a “clicking” noise.  
Fig. 2 In the headliner: correctly fitted net partition  
446  
Fig. 3 In the seat rail: correctly fitted net partition  
Installing the net partition  
1. Make sure that the sewn-in instructions label is pointing to the rear.  
2. Hook the net partition up onto the left-hand side→ Fig. 2.  
3. Push the rod together to hook the net partition onto the right-hand side.  
4. Pull the net partition to check that it has engaged securely in the retainers in the headliner.  
1
5. On the left and right sides, pull the strap down at the loop→ Fig. 3  
until you can insert the T-shaped  
holders into the outer seat rails.  
2
6. Turn each of the T-shaped holders through 90° so that they are positioned across the seat rails→ Fig. 3  
7. Make sure that the net partition is vertical and securely fitted in the seat rails.  
.
Removing the net partition  
1
1. Pull the loop→ Fig. 3  
down to slacken the strap.  
2. Turn the T-shaped holders by 90° and take them out of the seat rails.  
3. Push the net partition slightly inwards on one side and lift it out of the upper retainers.  
3
4. Press the release button → Fig. 1  
in the joint of each cross piece and fold the cross pieces together.  
5. Roll up the net partition and stow it in its plastic bag.  
6. Stow the plastic bag securely in the vehicle.  
WARNING  
Always use the net partition carefully, observing the instructions. Risk of injury.  
The net partition is secured properly in the roof only if the T-shaped holders are securely fitted into the retainers.  
The net partition is fitted correctly in the seat rails only if the T-shaped retainers are at right-angles to the seat  
rails and correctly engaged.  
The T-shaped holders must never be fitted close to the removable covers on the seat rails.  
Heavy, pointed or sharp items which are not stowed securely can cause injury in the event of sudden braking  
manoeuvres or accidents. This may also happen when the net partition is fitted correctly.  
Vehicle occupants must not travel behind a fitted safety net.  
447  
Rail system in rear vehicle floor  
There are four seat rails in the passenger compartment. Depending on the equipment level, the two middle seat rails  
can be configured either as twin rails or as single rails.  
Equipment  
Location  
Individual seats  
3-seat bench  
In each of the two outer seat rails  
In both outer seat rails  
Bed extension (MultiFlex board)  
Centre table  
In both outer seat rails  
In the two middle seat rails, only in twin-track configurations  
In both outer seat rails  
Net partition  
Cool box  
On the adapter plate in the two middle seat rails  
Other items of special equipment which can be fitted to the seat rails may be commercially available. An adapter may  
be needed for this purpose.  
All seats and accessories which have feet which fit into the seat rails must be properly fitted with all feet in the seat  
rails and engaged securely.  
WARNING  
If the equipment on the rail system is installed, removed or moved incorrectly, accidents and severe injuries may  
result.  
448  
Cover of rail system  
Fig. 1 In passenger compartment: view of seat rails from  
above.  
Removing plastic covers  
The plastic covers must be removed from the seat rails, if seats or the centre table are to be installed or removed.  
1. Take the screwdriver from the vehicle toolkit.  
2. Insert the flat blade of the screwdriver into the seat rail at an angle in front of the plastic cover you wish to  
1
remove → Fig. 1  
.
3. Press the cover lug approx. 3 mm to the front and, at the same time, lever it out.  
Removing split cover rail  
1. The aluminium cover rail consists of two parts.  
2. Press the middle of the aluminium cover rail with the flat of your hand.  
2
3. Slide the aluminium cover rail in the direction of the arrow→ Fig. 1  
4. Slide the opposite part of the aluminium cover rail in the direction of the arrow and remove it.  
5. Repeat this procedure for all seat rails.  
and remove it from the guide.  
Installing split cover rail  
1. Fit the aluminium cover rail so that it is flush with the fixed part of the cover rail.  
2. Press the aluminium cover rail from above into the guide rail and slide it onto the fixed part of the cover rail.  
3. Repeat this procedure for all seat rails.  
Installing plastic covers  
449  
1
Insert the plastic cover → Fig. 1  
with the recess at the front into the seat rail and press against the direction of  
the arrow until the cover engages securely. The cover must be flush with the seat rail.  
Ensure that the plastic covers for the double seat rails are not confused with each other as the covers will  
otherwise not engage securely.  
WARNING  
If the equipment in the seat rails is removed, installed or moved incorrectly, accidents and severe injuries may  
result.  
Take care when removing or installing the aluminium cover rails: Danger of injury through corners and edges.  
Always install the aluminium cover rails and plastic covers again before driving.  
Never remove the seat rails completely. All such work should be carried out by a correspondingly qualified  
workshop.  
If the seat rails are damaged, have them checked and if necessary replaced by a correspondingly qualified  
workshop.  
NOTICE  
If seats are moved when the seat rails are soiled, the seat rails and the seat feet could be damaged.  
Fastening rings  
Observe the maximum load rating of the fastening rings (→ Fastening rings).  
Fastening rings in rail system  
Fig. 1 In the seat rail: Fastening ring.  
The fastening rings in the seat rails can be used to secure loads→ Fig. 1.  
WARNING  
Incorrect use of fastening rings can cause severe or fatal accidents.  
Always use suitable and undamaged lashing straps or securing straps.  
Attach securing straps securely to the fastening rings.  
Loose objects in the vehicle can suddenly slide and change the way the vehicle handles.  
Never exceed the maximum load rating of the fastening rings when securing objects.  
Small and light objects should also be secured.  
Never secure a child seat using the fastening rings.  
Rotating individual seats must always be turned in the direction of travel if a load is secured behind these  
individual seats using fastening rings.  
Never use elastic straps or nets to tie down loads.  
Apply loads to the fastening rings evenly.  
450  
Ensure that the load retains its form and position once it has been secured. Use sturdy packaging and anti-slip  
floor surfacing for your load.  
T-shaped fastening ring  
Fig. 2 Load secured correctly using two tensioning straps  
Fig. 3 T-shaped fastening ring fitted correctly in the seat  
rail  
The T-shaped fastening rings are used to secure loads in addition to the fitted fastening rings.  
Conditions for installation of a T-shaped fastening ring  
A
B
A T-shaped fastening ring→ Fig. 2  
may only be used together with a fastening ring  
that is fitted in the  
vehicle.  
T-shaped fastening rings mayonly be fitted behind vehicle occupants.  
Turn the single swivel seats so that they face the direction of travel.  
The seat backrests of individual seats or of the 3-seat bench must be in an upright position.  
Fitting the T-shaped fastening ring  
1. Fit the T-shaped fastening ring parallel to the seat rail in the seat rail.  
451  
2
2. Turn the fastening ring through 90° so that it is positioned across the seat rails→ Fig. 3  
1
.
3. Pull the tensioning strap→ Fig. 3  
through the fastening ring, and tension it.  
Removing a T-shaped fastening ring  
1. Loosen the tensioning strap.  
2. Turn the fastening ring by 90° so that it is positioned parallel to the seat rail.  
3. Remove the fastening ring from the seat rail.  
WARNING  
Incorrect use of T-shaped fastening rings can cause severe or fatal accidents.  
Use the T-shaped fastening rings only together with a tensioning strap and remove them from the seat rail after  
use. The T-shaped fastening ring is secure only when it is tensioned together with a tensioning strap.  
The T-shaped fastening rings should never be inserted in the seat rails near the removable covers.  
Always secure the load with two tensioning straps to a total of four fastening rings→ Fig. 2. Use each tensioning  
strap with a maximum of one T-shaped fastening ring. The second fastening ring must always be a fastening ring  
that is fitted permanently in the vehicle.  
Fit T-shaped fastening rings only behind the vehicle occupants. Otherwise, in the event of an accident or sudden  
braking manoeuvre, vehicle occupants could hit the secured load with their heads or other body parts.  
Never install more than one T-shaped fastening ring in a seat rail at any one time.  
Never exceed the maximum load rating.  
Appropriate retaining straps, securing straps and load securing systems are available from correspondingly  
qualified workshops.  
Maximum load capacity of the fastening rings  
Fastening rings  
Fastening rings in the seat rails  
Permissible nominal tensile load  
250 daN  
300 daN  
T-shaped fastening ring  
1 daN (decanewton) corresponds to 10 newtons.  
Varying country-specific requirements are met.  
NOTICE  
Observe the details on the maximum load capacity of the individual fastening points. In the event of full braking,  
forces act that can be many times higher than the weight of the load being transported. Always use multiple  
fastening points in order to distribute absorption of these forces and to ensure equal stress on each fastening point.  
452  
Buckle straps  
Fig. 1 Fastening the buckle strap.  
Fastening the buckle strap  
2
1. Check before tightening: The lever→ Fig. 1  
objects.  
must not be in contact with the load, any edges or protruding  
2
4
2. Press and hold the lever→ Fig. 1  
on the buckle  
.
1
2
3
3. Feed the buckle strap→ Fig. 1  
4. Tighten the buckle strap → Fig. 1  
from the back to the front between lever  
and rib  
.
1
2
and release the lever  
.
Fig. 2 Releasing the buckle strap.  
Releasing the buckle strap  
1. Before releasing the buckle strap, make sure the load cannot fall over.  
2
1
4
2. Press the lever→ Fig. 2  
and pull the buckle strap  
1
out of the buckle  
.
2
3
3. Feed the buckle strap→ Fig. 2  
from the back to the front between lever  
and rib  
.
453  
1
2
4. Tighten the buckle strap → Fig. 2  
and release the lever  
.
Ratchet straps  
Fig. 1 Releasing and tightening the lever on the ratchet  
strap.  
Fig. 2 Releasing and tightening the lever on the ratchet  
strap.  
Fig. 3 Tightening the ratchet strap.  
454  
Tightening the ratchet strap  
2
1. Press the slider → Fig. 1  
2. Pivot the lever → Fig. 1  
outwards in the direction of the arrow.  
1
B
to position→ Fig. 2  
.
3
4
3. Pull the belt→ Fig. 2  
from the rear through the slot in the spool  
and tighten the belt.  
1
A
B
4. Pivot the lever → Fig. 1  
back and forth alternately between positions→ Fig. 2  
and  
until the belt has  
. The ratchet is  
wound itself around the spool two to three times →  
.
2
1
A
5. Press the slider → Fig. 1  
outwards and pivot the lever→ Fig. 1  
to position→ Fig. 2  
now closed and locked in position.  
Releasing the ratchet strap  
1. Before releasing the ratchet strap, make sure the load cannot fall over.  
2
2. Press the slider → Fig. 3  
outwards.  
1
C
2
5
engages in the end position . The spool  
4
3. Pivot the lever → Fig. 3  
now rotates freely.  
to position  
until the slider  
3
4. Pull the ratchet strap→ Fig. 2  
out of the ratchet.  
WARNING  
Incorrectly fastened ratchet straps may get detached in the event of a sudden braking manoeuvre or accident. This  
could cause objects to be flung through the interior and lead to severe or fatal injuries.  
Wind the strap around the spool 2 - 3 times.  
Never use ratchet straps to secure loads to the side panels.  
Fitting the removable towing coupling  
Fig. 1 Overview: Detachable ball coupling.  
455  
1
2
3
4
5
6
7
8
9
Protective cap.(Not always supplied.)  
Ball head.  
Retaining balls.  
Catch (ball) for locking element.  
Shank.  
Centring device.  
Handwheel.  
Key.  
Lock cover.  
10 Gap (pre-tensioned ball coupling)  
11 Green marking on the ball coupling.  
12 Green marking on handwheel.  
13 Red marking on handwheel.  
The removable ball coupling is located in the stowage compartment behind the front right seat.  
Step 1: Preparations  
1. Note down the number stamped on the key before using the removable ball coupling for the first time. You will  
need this number if you have to acquire a replacement key.  
2. Remove the sealing plug from the mount for the ball coupling under the bumper. Stow the sealing plug  
securely in the vehicle.  
7
5
3
3. Check to ensure that the mounting, handwheel→ Fig. 1  
, shank  
and the retaining balls  
of the ball  
coupling are all clean and undamaged . Clean if necessary.  
Step 2: Pre-tensioning the ball coupling  
The ball coupling cannot be fitted properly unless it is pre-tensioned.  
2
1. Grasp the ball coupling underneath the ball head→ Fig. 1  
9
with one hand.  
8
2. Remove the lock cap→ Fig. 1  
from the lock and insert the key  
into the lock.  
8
3. Turn the key → Fig. 1  
clockwise.  
7
A
4. Use your other hand to pull out the handwheel→ Fig. 1  
in the direction of arrow  
and hold it in this  
position →  
.
7
B
5. Turn the handwheel→ Fig. 1  
tensioned. The red marking  
in the direction of the arrow  
until it engages. The ball coupling is now pre-  
11  
13  
on the handwheel must point towards the green marking  
on the ball  
coupling. The handwheel protrudes clearly from the ball coupling. The gap between them is approximately  
10  
4 mm  
.
3
5
6. Check to see whether all retaining balls→ Fig. 1  
can be pressed fully into the ball coupling shank  
.
Step 3: Attaching the pre-tensioned ball coupling to the vehicle.  
456  
Do not touch the handwheel once the ball coupling has been pre-tensioned. When engaged, the handwheel will  
spring back to its original position and could cause injury →  
.
1. Guide the pre-tensioned removable ball coupling into the mounting tube from below.  
6
2. Push the ball coupling firmly upwards until it engages. Both centring devices→ Fig. 1  
mounting points on the vehicle.  
must engage in the  
7
3. The handwheel → Fig. 1  
has now returned to its original position. There is no longer a gap between the  
handwheel and the ball coupling.  
8
4. Turn the key → Fig. 1  
5. The handwheel → Fig. 1  
6. Fit the lock cap→ Fig. 1  
anticlockwise in the handwheel and remove it.  
7
9
may now no longer be pulled out.  
on the lock and place the key in the vehicle toolkit.  
Step 4: Safety check.  
Before hitching a trailer, check that the ball coupling is secured correctly.  
12  
11  
1. The green marking→ Fig. 1  
coupling.  
on the handwheel must point towards the green marking  
on the ball  
7
2. The handwheel → Fig. 1  
must rest on the ball coupling and there must be no gap between them.  
3. Shake or pull down on the ball coupling→ Fig. 1 with some force. It must sit firmly in the mounting→  
.
8
4. The lock must be locked and the key→ Fig. 1  
9
removed.  
5. The lock cover→ Fig. 1  
must cover the lock in the locking lever.  
WARNING  
Improper use of the towing bracket can cause injury and accidents.  
Only use the ball coupling when it is secured correctly.  
2
Never use the towing bracket if the smallest diameter of the ball→ Fig. 1  
is less than 49 mm.  
The ball coupling is heavy. When performing the safety check, the ball coupling could fall off and cause crush  
injuries.  
Do not touch the handwheel when the ball coupling is pre-tensioned. When the ball coupling is pressed into the  
mounting, the handwheel will jump back to its original position.  
If the ball coupling cannot be attached, have the towing bracket checked by a qualified workshop.  
Never use the towing bracket if the ball coupling does not engage properly or cannot be pre-tensioned.  
Never use the ball coupling if the key in the handwheel cannot be removed when the ball coupling is fitted. This  
means that the ball coupling is not locked properly.  
Always stow and secure the removed ball coupling in the storage box under the front right seat.  
NOTICE  
The mounting on the vehicle, handwheel, shank and retaining balls of the ball coupling must all be clean and  
undamaged. Otherwise you may not be able to lock the ball coupling securely.  
Do not aim a high-pressure cleaner or steam cleaner directly at the ball coupling mounting. This could wash the  
grease required for lubrication out of the mounting.  
Removing and slackening the ball coupling  
457  
Fig. 1 Overview: Removable ball coupling.  
1
2
3
4
5
6
7
8
9
Protective cap.(Not always supplied.)  
Ball head.  
Retaining balls.  
Catch (ball) for locking element.  
Shank.  
Centring device.  
Handwheel.  
Key.  
Lock cover.  
10 Gap (pre-tensioned ball coupling)  
11 Green marking on the ball coupling.  
12 Green marking on handwheel.  
13 Red marking on handwheel.  
1. Bring the vehicle to a standstill and apply the handbrake.  
2. Switch off the engine.  
3. Unhitch the trailer and disconnect the electrical connection between the vehicle and the trailer. If fitted,  
remove the adapter from the trailer socket.  
9
4. Remove the lock cap→ Fig. 1  
8
from the lock on the handwheel.  
5. Insert the key → Fig. 1  
into the lock and turn it clockwise  
2
6. Hold the ball coupling→ Fig. 1  
tightly in one hand→  
.
7
A
7. Use your other hand to pull out the handwheel→ Fig. 1  
position .  
in the direction of arrow  
and hold it in this  
458  
7
7
B
8. Turn the handwheel→ Fig. 1  
9. Hold the handwheel → Fig. 1  
in the direction of arrow  
until it engages.  
in this position and guide the ball coupling downwards out of the mounting.  
The ball coupling is now in the ready position.  
7
10. Release the handwheel→ Fig. 1  
and stow the pre-tensioned towing coupling safely with the vehicle toolkit.  
11. Insert the sealing plug into the mount for the ball coupling.  
WARNING  
The removable ball coupling is heavy. The ball coupling could fall off while it is being removed and cause crush  
injuries.  
Only unlock the ball coupling when a trailer is unhitched.  
WARNING  
An insufficiently secured ball coupling may be flung around in the vehicle interior during sudden braking or driving  
manoeuvres as well as in the event of an accident and cause injuries.  
Always stow the ball coupling safely in the vehicle.  
Dimensions and mounting points for retrofitting a towing bracket  
459  
Fig. 1 Dimensions and attachment points for retrofitting a  
towing bracket.  
A
B
C
D
E
F
Attachment points.  
1,075 mm.  
At least 65 mm.  
350 mm to 420 mm.  
160 mm.  
550 mm.  
G
758 mm.  
Dimensions  
The dimensions must be observed in all cases when retrofitting a towing bracket→ Fig. 1. Always observe the  
D
minimum distance given from the middle of the ball coupling  
to the surface of the road. The values refer to the  
vehicle with maximum load, including the maximum drawbar load.  
460  
Have the towing bracket retrofitted by a suitably qualified workshop. Conversion measures may be necessary on the  
cooling system, for example, or it may be necessary to fit heat shields.  
Install the towing bracket in accordance with the installation instructions provided.  
A retrofitted, non-removable towing bracket must not cover either the license plate or the lighting system at the rear  
of the vehicle. Observe the country-specific regulations on use of a towing bracket →  
.
WARNING  
Electrical accessories that are not connected properly can cause faults in the entire vehicle electronics system and  
also cause accidents and serious injuries.  
Never connect the trailer’s electrical system directly to the electrical connections of the tail light clusters or to  
other unsuitable sources of electricity. Only a suitable connector may be used to connect the trailer.  
When retrofitting a towing bracket to the vehicle, have the work carried out by a suitably qualified workshop.  
WARNING  
The trailer can become detached from the towing vehicle if the towing bracket is unsuitable or incorrectly fitted.  
This can cause serious accidents and fatal injuries.  
Use only towing brackets that are intended by the manufacturer for the corresponding vehicle model, model  
year and vehicle version.  
Introduction  
The vehicle can be used to tow a trailer if it has the required technical equipment for this.  
The additional trailer load will affect the amount of wear, energy consumption and performance of the vehicle and, in  
certain circumstances, could shorten the service intervals.  
Driving with a trailer not only places an extra load on the vehicle, but also requires increased concentration on the  
part of the driver.  
Vehicles with a start/stop system  
If towing brackets that werenot retrofitted by Volkswagen Commercial Vehicles are used, or if a towing bracket  
retrofitted by Volkswagen Commercial Vehicles is not detected for system-related reasons, the start/stop system  
must be deactivated manually using the button in the centre console before starting to tow a trailer and must  
remain deactivated for as long as a trailer is being towed →  
.
Trailer with lighting function check  
You must not use any trailer equipped with a tail light or brake light that requires a function check of these lights for  
its approval. Please contact the trailer manufacturer for information on the type of approval that applies to your  
trailer.  
Tachograph  
Use of a tachograph is required by law for vehicles with a gross vehicle weight rating in excess of 3,500 kg, including  
trailer, and used commercially to transport goods. This is irrespective of whether the vehicle or the trailer or both are  
used for commercial transportation of goods.  
Unused ball coupling  
Swivel in or remove the ball coupling if there is no trailer, bicycle carrier or similar equipment mounted on it. This  
applies in particular if the number plate or the lighting on the rear of the vehicle are obscured by the unused ball  
coupling. Observe the country-specific regulations on the use of a ball coupling.  
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DANGER  
It is dangerous to transport people in a trailer and it may also be illegal.  
Never transport people in a trailer.  
WARNING  
Improper use of the towing bracket can lead to a loss of vehicle control, accidents and serious injuries.  
Fit and use the trailer according to the instructions provided by the respective manufacturer.  
Use the towing bracket only if it is undamaged and fitted correctly.  
Do not carry out any alterations or repairs to the towing bracket.  
Swivel the ball coupling in or remove the ball coupling if possible to reduce the risk of injury in rear-end collisions  
and for pedestrians as well as cyclists in the event of parked vehicles.  
Never install a “weight-distributing” or “load-balancing” towing bracket to the vehicle. The vehicle was not  
constructed for these kinds of towing brackets. The towing bracket can fail, causing the trailer to tear loose from  
the vehicle.  
WARNING  
Towing a trailer and transporting heavy or bulky items can change the vehicle handling, increase the braking  
distance and lead to accidents.  
Always secure loads properly using suitable and undamaged lashing, retaining or securing straps.  
Ensure that your speed and driving style are always appropriate for the current visibility, weather and road/traffic  
conditions. Reduce your speed, particularly when driving downhill.  
Trailers with a high centre of gravity are more likely to tip over than trailers with a low centre of gravity.  
Always drive carefully and ensure that you think ahead. Accelerate particularly carefully and gently. Avoid abrupt  
and sudden driving and braking manoeuvres.  
Take special care when overtaking. Reduce your speed immediately if the trailer shows even the slightest sign of  
snaking.  
Do not drive faster than 80 km/h(50 mph) when towing a trailer, or 100 km/h (60 mph)in exceptional cases. This  
also applies to countries where higher speeds are permitted. Always obey national speed limits. Speed limits for  
vehicles towing trailers can be lower than for vehicles without trailers.  
Never try to stop a trailer from snaking by increasing your speed.  
WARNING  
The start/stop system must always be deactivated manually when towing a trailer using towing brackets that have  
not been retrofitted by Volkswagen Commercial Vehicles. Otherwise faults can occur in the brake system, possibly  
resulting in accidents and serious injuries.  
Always switch off the anti-theft alarm before hitching or unhitching a trailer (→ Anti-theft alarm). The tilt  
sensor could otherwise trigger an alarm unnecessarily.  
In vehicles with a new engine, do not tow a trailer during the first  
1,000 km.  
Depending on the equipment, the removable ball coupling is required for  
towing .  
Technical prerequisites  
Engine cooling system  
There is an increased load on the engine and the cooling system when towing a trailer. The cooling system must  
contain sufficient coolant and be able to cope with the extra load added by the trailer.  
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Overrun brake  
If the trailer is equipped with its own brake system, comply with the legal regulations.  
Exterior mirrors  
If you are unable to see the traffic behind the trailer in the vehicle's standard exterior mirrors, additional exterior  
mirrors should be fitted in accordance with any country-specific regulations. Before setting off, adjust the exterior  
mirrors so that you have a sufficient view of the rear.  
Towing brackets fitted to the rear bumper  
Do not carry out any alterations to the exhaust or brake systems. Check that the towing bracket is properly secured at  
regular intervals.  
Trailer tail light clusters  
The trailer tail light clusters must work correctly and meet legal requirements. Do not exceed the maximum power  
consumption for the trailer tail light clusters.  
WARNING  
If the towing bracket is unsuitable or incorrectly fitted, the trailer could become detached from the towing vehicle.  
This can cause serious accidents and fatal injuries.  
Do not carry out any alterations to the exhaust or brake systems.  
NOTICE  
The vehicle electronics may be damaged if the trailer's power consumption is too high.  
Never connect the trailer’s electrical system directly to the electrical connections of the tail light clusters or to  
other power sources. Use only suitable connections to supply power to the trailer.  
We recommend additional services between the normal inspection intervals if the vehicle is used frequently  
for towing a trailer.  
Hitching the trailer  
Trailer socket  
A 13-pin trailer socket makes the electrical connection between the towing vehicle and the trailer. The pin  
assignment corresponds to DIN ISO 11446.  
If the trailer has a 7-pin plug you will need to use a suitable adapter.  
1. Lift the closure cap of the socket and insert the connector.  
2. Turn the connector clockwise a quarter of a turn until it fully engages in the socket.  
3. Release the closure cap to lock the connector.  
4. Check the function of the entire lighting system before driving off.  
If you are uncertain whether the electrical connection of the trailer with the vehicle is correct, please contact a  
suitably qualified workshop.  
Emergency breakaway cable  
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Always fasten the trailer's emergency breakaway cable properly to the towing vehicle. Leave enough slack in the  
emergency breakaway cable so that the vehicle can still drive around corners. However the emergency breakaway  
cable should not drag along the ground while you are driving.  
Connection to the anti-theft alarm  
The trailer is integrated in the anti-theft system if the following conditions are fulfilled:  
When the vehicle has a factory-fitted anti-theft alarm and a factory-fitted towing bracket.  
When the trailer is electrically connected to the towing vehicle via the trailer socket.  
When the vehicle and trailer electric systems are functional, fault-free and undamaged.  
When the vehicle is locked with the vehicle key and the anti-theft alarm is active.  
When the vehicle is locked, the alarm will be triggered as soon as the electrical connection to the trailer is interrupted.  
Connection to the anti-theft alarm (trailer with LED tail light clusters)  
For technical reasons, trailers with LED tail lights cannot be integrated into the anti-theft alarm system.  
When the vehicle is locked, the alarm is not triggered as soon as the electrical connection to the trailer with LED rear  
lights is interrupted.  
WARNING  
Any electrical cables which are not connected properly or are connected incorrectly could cause a power surge to  
the trailer. This could lead to faults in the entire vehicle electronics system and could also cause accidents and  
serious injuries.  
All work on the electrical system should be carried out by a correspondingly qualified workshop.  
Never connect the trailer’s electrical system directly to the electrical connections of the towing vehicle’s tail light  
clusters or to other power sources.  
WARNING  
Contact between the pins in the trailer socket can lead to short circuits, overloading of the electrical system and  
failure of the lighting system, thereby causing accidents and serious injuries.  
Never connect the pins in the trailer socket to one another.  
Have any bent pins repaired by a correspondingly qualified workshop.  
NOTICE  
If you park the trailer using the support wheel or other trailer supports, disconnect the trailer from the vehicle. The  
vehicle could move up and down if the load changes or if there is damage to the tyres, for example. If this happens,  
a great deal of force will be exerted on the towing bracket and trailer, which could lead to damage to the vehicle  
and trailer.  
If there is a fault in the vehicle or trailer electrical systems, or if there is a fault in the anti-theft alarm, have  
the vehicle checked by a correspondingly qualified workshop.  
If the engine is not running and electrical equipment is switched on in the trailer via the trailer socket, the 12-  
volt vehicle battery will discharge.  
If the 12-volt vehicle battery charge level is low, the electrical connection to the trailer will be interrupted  
automatically.  
Loading the trailer  
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Basic information  
Always make sure that the vehicle and trailer are well balanced. Do not overload the front or rear of the trailer.  
Always stow heavy objects directly over the axle, or as close as possible to it. Always secure loads to the trailer  
properly →  
.
Trailer weight and drawbar load  
The maximum trailer weight is the weight that the vehicle can pull→  
.
The drawbar load is the weight that the towing bracket exerts on the ball coupling neck vertically from above .  
The figures for trailer weights and draw bar weights that are given on the data plate of the towing bracket are for  
certification purposes only. The correct values for your specific model, which may be lower than these figures, are  
given in the vehicle registration documents. All data in the official vehicle documents take precedence over these  
data.  
The maximum permissible drawbar load should always be utilised. The response of the trailer on the road will be poor  
if the drawbar load is too small.  
The drawbar load increases the weight on the rear axle and reduces the maximum load level as a result.  
Gross combination weight rating  
The combination weight is made up of the actual weight of the loaded towing vehicle and of the loaded trailer .  
In some countries, trailers are divided into different classes. We recommend that you contact a qualified workshop to  
find out about suitable trailers.  
Tyre pressure  
Follow the trailer manufacturer's recommendations concerning the tyre pressure for the trailer tyres.  
1. When towing a trailer, inflate the tyres on the towing vehicle with the maximum permitted tyre pressure  
(→ Tyre pressure).  
WARNING  
Loads that may slide can severely impair stability and driving safety, which can cause accidents and severe injuries.  
Always load trailers properly.  
Always secure loads using suitable and undamaged lashing and securing straps.  
WARNING  
Accidents and serious injuries can occur if you exceed the vehicle's maximum permitted gross axle weight rating,  
drawbar load, gross vehicle weight rating or gross combination weight rating.  
Never exceed the stated values.  
Never exceed the maximum gross axle weight rating with the current weight on the front and rear axles.  
Never exceed the gross vehicle weight rating with the front and rear weights of the vehicle.  
Driving with a trailer  
Headlight adjustment  
Towing a trailer can raise the front end of the vehicle enough for the dipped beam to blind other road users. Use the  
headlight range control to lower the light cone as required. If you do not have headlight range control, the headlights  
should be adjusted by a qualified workshop.  
465  
Things to note when driving with a trailer  
If the trailer has an overrun brake, apply the brakesgently at first and then firmly. This will prevent the jerking that  
can be caused by the trailer wheels locking.  
The combination weight causes the braking distance to increase.  
Select a low gear before driving down a slope. This enables you to use the engine braking effect to slow down the  
vehicle. The brake system could otherwise overheat and fail.  
The vehicle's centre of gravity and in turn the vehicle's handling will change because of the trailer load and the  
increased gross weight of the vehicle and trailer.  
The weight distribution of a loaded trailer with an unladen towing vehicle is very unfavourable. When driving in  
this situation, drive particularly carefully and slowly.  
Pulling off on slopes when towing a trailer  
Depending on the steepness of the slope and the total weight of the trailer and vehicle, a vehicle towing a trailer  
could roll back a short distance when moving off on a hill.  
When towing a trailer, pull off on slopes as follows:  
1. Depress and hold the brake pedal.  
2. In vehicles with a manual gearbox: Fully depress the clutch pedal.  
3. 1st Select a gear or the D position.  
4. Unlock handbrake and carefully release while holding down lock button.  
5. Gently depress the accelerator and, in a manual vehicle, release the clutch pedal until you feel the vehicle  
moving forwards. If necessary, observe the information on Hill Start Assist (→ Hill Start Assist).  
6. Only let go of the handbrake lever when the engine has sufficient power to move off.  
7. Pull away slowly.  
WARNING  
Incorrect trailer towing can cause loss of vehicle control and serious personal injury.  
Towing a trailer and transporting heavy or bulky items can change the way the vehicle handles and increase the  
braking distance.  
Always drive carefully and ensure that you think ahead. Brake earlier than usual.  
Adapt your speed and driving style to the current visibility, weather and road or traffic conditions. Reduce your  
speed, particularly when driving downhill.  
Accelerate particularly carefully and gently. Avoid abrupt and sudden driving and braking manoeuvres.  
Take extra care when overtaking. Reduce your speed immediately if the trailer shows even the slightest sign of  
snaking.  
Never try to stop a trailer from snaking by increasing your speed.  
Always obey maximum speed limits. In some areas, speed limits for vehicles towing trailers are lower than for  
vehicles without trailers.  
Trailer stabilisation  
The trailer stabilisation function can detect if an attached trailer is starting to snake from side to side and can provide  
counter steering assistance.  
Trailer stabilisation is an extension of the Electronic Stability Control (ESC  
).  
If a lurching motion is detected, the trailer stabilisation function automatically helps to reduce the trailer's rocking  
motion using counter steering assistance. The trailer stabilisation function may be deactivated in some countries.  
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Requirements for trailer stabilisation  
The vehicle is a factory-fitted towing bracket or a compatible towing bracket is fitted.  
Electronic Stability Control and traction control system (TCS  
) are active. The indicator lamp or in the instrument cluster is not lit up.  
The trailer is electrically connected to the towing vehicle via the trailer socket.  
The vehicle speed is higher than approximately 60 km/h(37 mph).  
The maximum drawbar load is being used.  
The trailer must have a rigid drawbar.  
Trailers with brakes must have a mechanical overrun system.  
WARNING  
Do not let the extra safety afforded by the trailer stabilisation function tempt you into taking any risks when driving.  
Adapt your speed and driving style to the current visibility, weather and road or traffic conditions.  
Accelerate carefully on slippery surfaces.  
Take your foot off the accelerator when a system is regulating.  
WARNING  
The trailer stabilisation function may not be able to detect all driving situations correctly.  
Trailer stabilisation is switched off when ESC is deactivated.  
Light trailers that are snaking will not be recognised by the trailer stabilisation function and stabilised accordingly  
in all cases.  
A trailer can stilljack-knife on slippery roads with little grip, even if the towing vehicle is equipped with the trailer  
stabilisation system.  
Trailers with a high centre of gravity might tip over before snaking starts.  
Sudden braking procedures could occur automatically in extreme driving situations if the trailer socket is being  
used without a trailer.  
Introduction  
Rear carrier systems include equipment such as bicycle carriers or hunters’ boxes, for example. There are rear carrier  
systems for installation on the ball coupling or on the boot lid.  
Use only rear carrier systems that are intended by the manufacturer for the corresponding vehicle model, model year  
and vehicle version.  
Volkswagen Commercial Vehicles recommends the use of Volkswagen Genuine Accessories, which you can purchase  
from your Volkswagen Commercial Vehicles dealership.  
Mount the rear carrier system in accordance with the manufacturer’s assembly instructions.  
467  
Fitting a rear carrier system (e.g. bicycle carrier) on the ball coupling  
Maximum load of the rear carrier system  
The load capacity is made up of the rear carrier system and the load transported on it.  
The maximum recommended load of the rear carrier system fitted on the ball coupling may differ from the vehicle-  
specific drawbar load of the vehicle.  
However, the model-specific maximum drawbar load of the towing bracket must not be exceeded.  
The load capacity decreases due to the leverage effect the further away the centre of gravity of the rear carrier  
system is from the ball head.  
Position heavy objects as close to the ball coupling as possible.  
Vehicle-specific maximum load capacity  
To find out the recommended load capacity for your vehicle, check what the drawbar load of your vehicle is . The  
following table shows the load capacity. Volkswagen Commercial Vehicles recommends that the specified number of  
bicycles on the rear carrier system is adhered to in accordance with guideline UN-R 55.  
Vehicle-specific drawbar load  
Maximum load  
50 kg  
Number of bicycles  
50 kg  
55 kg  
2
2
3
55 kg  
From 75 kg  
75 kg  
Maximum overhang of the rear carrier system  
Fig. 1 Illustration of the maximum overhang on a bicycle  
carrier for two or three bicycles.  
A
B
With up to 55 kg load capacity: 500 mm.  
With 75 kg load capacity: 700 mm.  
The maximum overhang for bicycle carrier systems with two bicycles from the centre of the ball head to the centre of  
A
the rail of the last bicycle carrier must not exceed 500 mm → Fig. 1  
. For bicycle carrier systems with three  
B
bicycles, 700 mm → Fig. 1  
must not be exceeded.  
468  
WARNING  
Incorrect use of a rear carrier system mounted on the ball coupling of the towing bracket can cause accidents and  
injuries.  
Make sure that the rear carrier system is suitable for use on your vehicle.  
Always read and follow the installation instructions provided by the rear carrier system manufacturer.  
Never secure a rear carrier system to the ball neck under the coupling ball. The rear carrier system could slip out  
of position due to the shape of the ball neck.  
NOTICE  
Considerable vehicle damage could occur if the maximum permitted payload specified in the manufacturer's  
assembly instructions or the overhang is exceeded.  
Never exceed the values stated in the installation instructions.  
Remove as many add-on parts as possible from the rear carrier system before setting off. This includes, for  
example, bicycle bags and baskets, child seats or batteries. This helps improve the rear carrier system's wind  
load and centre of gravity.  
Introduction  
Depending on the model, the vehicle may be designed for fitting a roof load carrier.  
Roof load carriers can be used to transport bulky items on the roof of the vehicle.  
Please contact a suitably qualified workshop if you are unsure whether a roof load carrier can be fitted to your  
vehicle.  
Volkswagen Commercial Vehicles recommends the use of Volkswagen Genuine Parts or Volkswagen Genuine  
Accessories, which you can purchase from your Volkswagen Commercial Vehicles dealership  
Do not use or retrofit a roof load carrier if the vehicle isnot approved for use with a roof load carrier.  
Roof carriers cannot be fitted on vehicles that also have additional lighting factory-fitted on the vehicle roof.  
WARNING  
When transporting heavy or bulky objects on the roof load carrier, the way the vehicle handles will change due to a  
shift in the centre of gravity and increased susceptibility to crosswinds.  
Always secure loads properly using suitable and undamaged lashing, retaining or securing straps.  
Cargo that is large, heavy, bulky, long or flat will have a negative effect on the vehicle aerodynamics, centre of  
gravity and overall handling.  
Avoid abrupt and sudden driving and braking manoeuvres.  
Ensure that your speed and driving style are always appropriate for the current visibility, weather and road/traffic  
conditions.  
WARNING  
Fitting a roof load carrier that has not been approved for the vehicle or fitting a roof load carrier to a vehicle that is  
not approved for use with a roof load carrier can cause accidents and injuries.  
Use only roof load carriers that have been approved for the vehicle.  
Never fit a roof load carrier on a vehicle that has not been approved for use with a roof load carrier. If you fit a  
roof load carrier to such vehicles, it may work loose whilst the vehicle is in motion and fall off the vehicle roof.  
NOTICE  
Securing a roof load carrier of any kind to a vehicle that is not approved for use with a roof load carrier can seriously  
damage the vehicle.  
469  
Attaching the base carrier and roof load carrier  
With some equipment levels, the vehicle has special roof rails on the right and left for fitting the mounts.  
Special roof load carriers must be used to transport loads, bicycles, surfboards, skis and boats safely. Appropriate  
accessories are available from a correspondingly qualified workshop.  
Attaching the base carrier and roof load carrier  
Install the base carrier bars in accordance with the supplied installation instructions.  
Attach the base carrier bars only to the rails .  
Once you have fitted the base carrier bars, you can then secure the respective roof load carrier on them.  
WARNING  
Incorrectly attaching and using the mounts or roof bars and roof load carrier can cause the whole roof load carrier to  
fall off the roof. This can cause accidents and injuries.  
Use base carrier bars or roof bars and roof load carriers only when they are undamaged and fitted correctly.  
Always fit base carrier bars or roof bars and roof load carriers properly. Always observe the installation  
instructions provided by the manufacturer.  
Attach the base carrier bars or roof bars only at the specified mounting points.  
Special roof load carriers for items such as bicycles, skis, surfboards, etc. must always be installed properly.  
Always observe the installation instructions provided by the manufacturer.  
Check that the roof load carrier is secured before starting your journey and tighten as necessary after driving a  
short distance. During a long trip, check all bolts and fasteners at each stop.  
Do not carry out any modifications or repairs to base carrier bars, roof bars or the roof load carrier.  
470  
Loading the roof load carrier  
Loads can be attached securely only when the roof load carrier system is fitted correctly→  
.
Maximum permissible roof load  
Vehicles with normal roof100 kg.  
Vehicles with pop-up roof 50 kg.  
Dropside van with double cab75 kg.  
Dropside van with single cab50 kg.  
The roof load limit refers to the combined weight of the roof load carrier and the load carried on the roof→  
.
Make sure you are aware of the weight of the roof load carrier and the load to be transported. Weigh the load if  
necessary.  
However, you will not be able to carry the maximum permitted roof load if you are using a roof load carrier with a  
lower load rating. In this case, do not exceed the maximum weight limit for the load carrier system which is specified  
in the manufacturer's installation instructions.  
Distributing the load  
1. Distribute the load evenly and secure it correctly→  
.
Checking the fittings  
After the base carriers and roof load carrier have been attached, check the bolted connections and fastenings once  
you have travelled a short distance and then at regular intervals.  
WARNING  
Accidents and vehicle damage can occur if the maximum permitted roof load is exceeded.  
Never exceed the specified roof load, the maximum permissible axle loads, and the permissible gross vehicle  
weight for the vehicle.  
Do not exceed the load capacity of the roof carrier, even if the maximum roof load has not been reached.  
WARNING  
Loose and incorrectly secured loads can fall off the roof load carrier and cause accidents and injuries.  
Always use suitable and undamaged lashing, retaining or securing straps.  
NOTICE  
When opening the boot lid, make sure that it does not collide with the roof load.  
471  
Notes on use  
Remove the roof load carrier in the following situations  
The roof load carrier is no longer needed.  
Before entering an automatic car wash.  
When the vehicle height exceeds the required clearance height, e.g. in a garage.  
NOTICE  
Always remove the roof load carrier before driving through an automatic car wash.  
Installing a roof load carrier and securing a load to it changes the height of the vehicle. Check and compare the  
height of the vehicle with clearance heights, e.g. for underpasses and garage doors.  
The function of other components such as the boot lid must not be impeded by the roof load carrier.  
When the roof load carrier is fitted, consumption increases due to the increased air  
resistance.  
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