Get Maintenance and care -> Engine compartment Guide for Mercedes GLE SUV First Generation (2016-2019)

Engine compartment

336

Engine compartment

R remove jewellery and watches

R keep items of clothing and hair, for exam-

Bonnet

ple, away from moving parts.

Important safety notes

G WARNING

The ignition system and the fuel injection sys-

An unlocked bonnet may open up when the

tem operate with a high voltage. If you touch

vehicle is in motion and block your view. There

the live components, you could receive an

is a risk of an accident.

electric shock. There is a danger of injury.

Never unlock the bonnet when driving. Before

Never touch components of the ignition sys-

every trip, ensure that the bonnet is locked.

tem or the fuel injection system when the

ignition is switched on.

G WARNING

Components which are under voltage include

When being opened and closed, the bonnet

ignition coils, spark plug connectors and diag-

may suddenly fall into the closed position.

nostics sockets.

There is a risk of injury to persons in the range

Plug-in hybrid: be sure to read the separate

Maintenance and care

of movement of the bonnet.

Owner's Manual. You could otherwise fail to

Open and close the bonnet only when nobody

recognise dangers, e.g. due to high voltage.

is in the range of movement.

Active bonnet (pedestrian protection)

G WARNING

Operating principle

If you open the bonnet while the engine is

overheating or while there is a fire in the

! A triggered active bonnet must be repaired

at a qualified specialist workshop. The active

engine compartment, you could come into

bonnet function will then be available again.

contact with hot gases or other leaking ser-

The additional pedestrian protection provided

vice products. There is a danger of injury.

by the active bonnet will then be restored.

Allow an overheating engine to cool down

i The active bonnet is available only for cer-

before opening the bonnet. If there is a fire in

tain countries. It is available for all models,

the engine compartment, leave the bonnet

except for the Mercedes-AMG GLE 63

closed and notify the fire brigade.

4MATIC.

The active bonnet can reduce the risk of injury to

G WARNING

pedestrians in certain accident situations. Rais-

There are moving components in the engine

ing the active bonnet increases the clearance to

hard components, such as the engine.

compartment. Certain components may con-

If the active bonnet has been triggered, it is

tinue to move or suddenly move again even

raised at the rear in the area around the hinge by

after the ignition has been switched off, e.g.

approximately 100 mm. The active bonnet is

the radiator fan. There is a risk of injury.

triggered by pyrotechnics.

If you have to carry out work in the engine

For the drive to the workshop, reset the trig-

compartment:

gered active bonnet yourself. After being reset,

the active bonnet rests in the area of the hinges

R switch off the ignition

on the seals, and the hinges do not engage. For

R never touch the dangerous areas surround-

this reason, we recommend that you do not

ing moving components, e.g. the rotation

exceed a maximum permissible speed of

area of the fan

130 km/h on the way to the workshop. If the

active bonnet has been triggered, pedestrian

protection may be limited.

Engine compartment

337

Resetting

X Make sure that the windscreen wipers are

switched off.

X With your hand flat near the hinges (arrows),

X Pull release lever : on the bonnet.

push down active bonnet : until it rests on

The bonnet is released.

the seals.

Opening the bonnet

Maintenance and care

G WARNING

Certain components in the engine compart-

ment could be very hot, e.g. the engine, the

radiator and parts of the exhaust system.

There is a risk of injury when accessing the

engine compartment.

As far as possible, allow the engine to cool

down and only touch the components descri-

X Reach into the gap, pull bonnet catch han-

bed in the following.

dle ; up and lift the bonnet.

If you lift the bonnet by approximately 40 cm,

G WARNING

the bonnet is opened and held open automat-

When the bonnet is open, and the windscreen

ically by the gas-filled strut.

wipers are set in motion, you can be injured by

the wiper linkage. There is a risk of injury.

Closing the bonnet

Always switch off the windscreen wipers and

X Lower the bonnet and let it fall from a height

the ignition before opening the bonnet.

of approximately 20 cm.

X Check that the bonnet has engaged properly.

! Make sure that the windscreen wipers are

If the bonnet can be raised slightly, it is not

not folded away from the windscreen. Other-

properly engaged. Open it again and close it

wise, you could damage the windscreen wip-

with a little more force.

ers or the bonnet.

Radiator

Vehicles with a diesel engine: do not cover

the radiator. Do not use thermal mats, insect

protection covers or anything similar. Other-

wise, the values of the European on-board diag-

nostics may be affected. Some of these values

are required by law and must always be correct.

Engine compartment

338

When checking the oil level:

Engine oil

R park the vehicle on a level surface.

Important safety notes

R the engine should be switched off for approx-

imately five minutes if the engine is at normal

G WARNING

operating temperature.

Certain components in the engine compart-

R if the engine is not at normal operating tem-

ment could be very hot, e.g. the engine, the

perature, e.g. if the engine was only started

radiator and parts of the exhaust system.

briefly, wait approximately 30 minutes before

carrying out the measurement.

There is a risk of injury when accessing the

engine compartment.

Checking the oil level using the dipstick

As far as possible, allow the engine to cool

down and only touch the components descri-

bed in the following.

G WARNING

If you open the bonnet while the engine is

overheating or while there is a fire in the

Maintenance and care

engine compartment, you could come into

contact with hot gases or other leaking ser-

vice products. There is a danger of injury.

Allow an overheating engine to cool down

before opening the bonnet. If there is a fire in

Example: vehicles with a petrol engine

the engine compartment, leave the bonnet

closed and notify the fire brigade.

G WARNING

If engine oil comes into contact with hot com-

ponents in the engine compartment, it may

ignite. There is a risk of fire and injury.

Make sure that engine oil does not spill out

over the filler neck. Allow the engine to cool

down and thoroughly clean the components

that have come into contact with engine oil

before you start the engine.

Example: vehicles with a diesel engine

X Pull dipstick : out of the dipstick tube.

Plug-in hybrid: be sure to read the separate

X Wipe off oil dipstick :.

Owner's Manual. You could otherwise fail to

recognise dangers, e.g. due to high voltage.

X Slowly slide oil dipstick : into the guide tube

to the stop, and take it out again.

If the level is between MIN mark = and MAX

General notes

mark ;, the oil level is correct.

Depending on your driving style, the vehicle

X If the oil level has dropped to MIN mark = or

consumes up to 0.8 litres of oil per 1,000 km.

below, top up with 1.0 l of engine oil.

The oil consumption may be higher than this

when the vehicle is new or if you frequently drive

at high engine speeds.

Depending on the engine, the oil dipstick may be

installed at a different location.

Engine compartment

339

Topping up engine oil

Further information on engine oil ( Y page 391).

H Environmental note

Other service products

When topping up the oil, take care not to spill

any. If oil enters the soil or waterways, it is

Important safety notes

harmful to the environment.

G WARNING

! Use only engine oils and oil filters that are

Certain components in the engine compart-

approved for vehicles with a service system. A

ment could be very hot, e.g. the engine, the

list of the engine oils and oil filters that have

been tested and approved in accordance with

radiator and parts of the exhaust system.

Mercedes-Benz Specifications for Service

There is a risk of injury when accessing the

Products is available at any Mercedes-Benz

engine compartment.

Service Centre.

As far as possible, allow the engine to cool

The following cause engine failure or damage

down and only touch the components descri-

to the exhaust system:

bed in the following.

R Use of engine oils and oil filters that have

not been expressly approved for the service

G WARNING

Maintenance and care

system

The cooling system is pressurised, particu-

R Replacement of engine oil and oil filter after

the replacement interval specified by the

larly when the engine is warm. If you open the

service system has expired

cap, you could be scalded if hot coolant

R Use of engine oil additives

sprays out. There is a risk of injury.

Let the engine cool down before you open the

! Do not add too much oil. Topping up with too

much engine oil can result in damage to the

cap. Wear gloves and eye protection. Open

engine or to the catalytic converter. Have

the cap slowly to release the pressure.

excess engine oil siphoned off.

The coolant level may only be checked and cool-

ant topped up when the engine and engine cool-

ing system have cooled down.

G WARNING

If windscreen washer concentrate comes into

contact with hot components of the engine or

the exhaust system, it can ignite. There is a

risk of fire and injury.

Make sure the windscreen washer concen-

trate does not come into contact with the filler

neck.

Example: engine oil filler cap

X Turn cap : anti-clockwise and remove it.

X Top up the engine oil.

If the oil level is at or below the MIN mark on

the oil dipstick, top up with 1.0 l of engine oil.

X Replace cap : on the filler neck and turn

clockwise.

Make sure that the cap locks securely into

place.

X Check the oil level again with the oil dipstick

( Y page 338).

ASSYST PLUS

340

Checking the coolant level

Topping up the windscreen washer sys-

tem

X Park the vehicle on a level surface.

Example: washer fluid reservoir

Check the coolant level only if the vehicle is

on a level surface and the engine has cooled

X To open: pull cap : upwards by the tab.

down.

X Top up with the premixed washer fluid.

X Turn the key to position 2 in the ignition lock

X To close: press cap : onto the filler neck

Maintenance and care

( Y page 144).

until it engages.

On vehicles with KEYLESS-GO, press the

If the washer fluid level drops below the recom-

Start/Stop button twice ( Y page 146).

mended minimum of 1 litre, a message appears

X Check the coolant temperature gauge in the

in the multifunction display prompting you to

multifunction display.

top up the washer fluid ( Y page 288).

The coolant temperature must be below

Further information on windscreen washer fluid

70 †.

( Y page 393).

X Turn the key to position u ( Y page 144) in

the ignition lock.

X On vehicles with KEYLESS-GO, press the

ASSYST PLUS

Start/Stop button ( Y page 146).

X Press the Start/Stop button ( Y page 146).

Service message

X Slowly turn cap : half a turn anti-clockwise

i If the scheduled service intervals are excee-

and allow excess pressure to escape.

ded, this may result in damage to the vehicle.

X Turn cap : further anti-clockwise and

remove it.

You can obtain current information concerning

If the coolant is at the level of marker bar =

the servicing of your vehicle from a qualified

in the filler neck when cold, there is enough

specialist workshop.

coolant in coolant expansion tank ;.

i The ASSYST PLUS service interval display

If the coolant level is approximately 1.5 cm

does not show any information on the engine

above marker bar = in the filler neck when

oil level. Observe the notes on the engine oil

warm, there is enough coolant in coolant

level ( Y page 338).

expansion tank ;.

The multifunction display shows a service mes-

X If necessary, top up with coolant that has

sage for a few seconds, e.g.:

been tested and approved by Mercedes-Benz.

R Service A in .. days

X Replace cap : and turn it clockwise as far as

R Service A due

it will go.

R Service A overdue by .. days

Further information on coolant ( Y page 393).

Depending on the operating conditions of the

vehicle, the remaining time or distance until the

next service due date is displayed.

The letter indicates which service is due. A

stands for a minor service and B for a major ser-

Maintenance and care -> Engine compartment for Your Mercedes GLE SUV First Generation (2016-2019)

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