Get Maintenance and care -> Engine compartment Guide for Mercedes GLA SUV Second Generation (2020-2026)

The vehicle can detect if certain wear parts need

to be replaced or if malfunctions have occurred in

vehicle systems. If the Telediagnostics service is

activated, relevant data is automatically transmit-

ted to the manufacturer. If fault conditions are

detected by the vehicle system self-diagnosis, the

system transmits recommendations for action to

the Mercedes-Benz customer centre depending

on the fault detected. The customer centre trans-

mits the data to the service partner that you have

entered on the Mercedes me website at:

www..

For selected faults, the notication that a mal-

function has been detected may appear in the

multimedia system with a request to contact the

Mercedes-Benz Customer Centre. From this mes-

sage, a call can be made directly to the customer

centre for assistance.

The transmission of a notication to the multi-

media system depends on the country, vehi-

cle model and equipment and requires a fast

data connection, over which the service pro-

vider has no inuence.

Reliable fault detection is subject to technical

limitations. Therefore, only a limited selection

of faults can be detected and recommenda-

tions for action transmitted to the customer

centre and the service partners. Mercedes-

Benz AG is continuously working on the

expansion of this service. The fault detection

depends on the country, vehicle model and

equipment.

Data transferred when using Telediagnostics

When the service is activated, relevant data is

automatically transferred to determine the

required scope of maintenance as well as fault

detection and fault rectication.

Details on data transfer can be found in the data

protection information for the Mercedes me con-

nect services. These can be found at:

www. under "My Mercedes me

account", "Terms of use".

The scope of the transmitted data depends on

the vehicle model and its equipment. For

technical reasons, not all data is available at

all times.

Engine compartment

Active bonnet (pedestrian protection)

▌Operation of the active bonnet (pedestrian pro-

tection)

In certain accident situations, the actuation of the

active bonnet reduces the risk of injury to pedes-

trians. The rear area of the bonnet is raised by

approximately 70 mm.

For the drive to the workshop, reset the actuated

active bonnet yourself (/ page 576).

Aer the active bonnet has been actuated, pedes-

trian protection may be limited.

Have the full functionality of the active bonnet

restored in a qualied specialist workshop.

▌Resetting the active bonnet

WARNING Risk of burns from hot compo-

nent parts in the engine compartment

Certain component parts in the engine com-

partment can be very hot, e.g. the engine, the

cooler and parts of the exhaust system.

576

Maintenance and care

F247 0074 02

Allow the engine to cool down and only

touch component parts described in the

following.

With your hand at, push down active bonnet

1 in the area around the hinges on both

sides (arrows).

In doing so, the actuator is depressurised and

you may hear a hissing sound.

The engine bonnet must engage in position.

If the active bonnet can be raised slightly at

the rear in the area of the hinges, repeat the

step until it engages correctly.

Opening and closing the bonnet

DANGER Risk of fatal injuries when carry-

ing out maintenance work during the

charging process

During the charging process, the high-voltage

on-board electrical system is under high volt-

age.

Do not perform any maintenance work

during the charging process.

WARNING Risk of accident due to driving

with the bonnet unlocked

The bonnet may open and block your view.

Never release the bonnet when driving.

Before every trip, ensure that the engine

bonnet is locked.

WARNING Risk of accident and injury

when opening and closing the bonnet

The bonnet may suddenly drop into the end

position.

There is a risk of injury for anyone in the

engine bonnet's range of movement.

Do not open or close the bonnet if there

is a person in the bonnet's range of

movement.

WARNING Risk of burns when opening the

bonnet

If you open the bonnet in the event of an over-

heated engine or re in the engine compart-

ment, the following situations may occur:

You may come into contact with hot gases.

You may come into contact with other

escaping hot operating uids.

Before opening the bonnet, allow the

engine to cool down.

In the event of a re in the engine com-

partment, keep the bonnet closed and

call the re service.

Maintenance and care

577

F247 0074 02

WARNING Risk of injury due to moving

parts

Components in the engine compartment may

continue to run or start unexpectedly even

when the drive system is switched o.

Observe the following if you must open the

bonnet:

Switch o the vehicle.

Never touch the danger zones surround-

ing moving components, e.g. the rotation

area of the fan.

Remove jewellery and watches.

Keep items of clothing and hair away

from moving parts.

WARNING Risk of injury from touching

components under voltage

The ignition system and the fuel injection sys-

tem operate at high voltage. You could receive

an electric shock.

Never touch ignition system or fuel injec-

tion system components when the vehi-

cle is switched on.

The live components include the following, for

example:

Ignition coils

Fuel injectors

Electric lines to the ignition coils and the fuel

injectors

WARNING Risk of burns from hot compo-

nent parts in the engine compartment

Certain component parts in the engine com-

partment can be very hot, e.g. the engine, the

cooler and parts of the exhaust system.

Allow the engine to cool down and only

touch component parts described in the

following.

WARNING Risk of injury from using the

windscreen wipers when the bonnet is

open

If the windscreen wipers start moving when

the bonnet is open, you could be trapped by

the wiper linkage.

Always switch o the windscreen wipers

and the vehicle rst if you need to open

the bonnet.

578

Maintenance and care

F247 0074 02

Opening the bonnet

To release the bonnet, pull on handle 1.

Push yellow handle 2 of the bonnet catch to

the le as far as it will go (palm downwards).

Li the bonnet until it is automatically raised

by the pneumatic spring.

Closing the bonnet

Lower the bonnet and let it drop from a height

of approximately 20 cm.

If the bonnet can still be lied slightly, open

the bonnet again and close it with a little force

until it engages correctly.

Engine oil

▌Checking the engine oil level using the driver's

display

Requirements

The engine has been warmed up.

The vehicle is parked on a level surface.

The engine is running at idle speed.

The bonnet is closed.

Determining the engine oil level can take up to

30 minutes with a normal driving style and even

longer with an active driving style.

Driver's display:

Service

The engine oil level is shown.

Maintenance and care

579

F247 0074 02

One of the following messages will appear on the

driver's display:

Engine oil level Measuring now…: the engine

oil level cannot be determined yet.

Repeat the request aer a maximum of

30 minutes' driving.

Engine oil level OK and the bar display for

indicating the engine oil level on the driver's

display is green and is between "min" and

"max": the engine oil level is correct.

Engine oil level Top up 1,0 l and the bar dis-

play for indicating the engine oil level on the

driver's display is yellow and is below "min":

Add 1 l of engine oil.

Engine oil level Reduce and the bar display for

indicating the engine oil level on the driver's

display is yellow and is above "max":

Drain o any excess engine oil that has been

added. To do so, consult a qualied specialist

workshop.

For engine oil level, switch on vehicle

Switch on the vehicle to check the engine oil

level.

Engine oil level System inoperative: The oil

level sensor is defective or not connected.

Consult a qualied specialist workshop.

Engine oil level System currently inoperative

Close the bonnet.

▌Topping up engine oil

DANGER Risk of fatal injuries when carry-

ing out maintenance work during the

charging process

During the charging process, the high-voltage

on-board electrical system is under high volt-

age.

Do not perform any maintenance work

during the charging process.

WARNING Risk of burns when opening the

bonnet

If you open the bonnet in the event of an over-

heated engine or re in the engine compart-

ment, the following situations may occur:

You may come into contact with hot gases.

You may come into contact with other

escaping hot operating uids.

Before opening the bonnet, allow the

engine to cool down.

In the event of a re in the engine com-

partment, keep the bonnet closed and

call the re service.

WARNING Risk of injury due to moving

parts

Components in the engine compartment may

continue to run or start unexpectedly even

when the drive system is switched o.

Observe the following if you must open the

bonnet:

580

Maintenance and care

F247 0074 02

Switch o the vehicle.

Never touch the danger zones surround-

ing moving components, e.g. the rotation

area of the fan.

Remove jewellery and watches.

Keep items of clothing and hair away

from moving parts.

WARNING Risk of burns from hot compo-

nent parts in the engine compartment

Certain component parts in the engine com-

partment can be very hot, e.g. the engine, the

cooler and parts of the exhaust system.

Allow the engine to cool down and only

touch component parts described in the

following.

WARNING Risk of re and injury from

engine oil

If engine oil comes into contact with hot com-

ponent parts in the engine compartment, it

may ignite.

Make sure that no engine oil is spilled

next to the ller opening.

Allow the engine to cool o and thor-

oughly clean the engine oil from compo-

nent parts before starting the vehicle.

NOTE Engine damage caused by an incor-

rect oil lter, incorrect oil or additives

Do not use engine oils or oil lters which

do not correspond to the specications

explicitly prescribed for the service inter-

vals.

Follow the instructions on the service

interval display for changing the engine

oil and observe the prescribed change

intervals.

Do not use additives.

NOTE Damage caused by topping up too

much engine oil

Excess engine oil can damage the engine or

catalytic converter.

Have excess engine oil removed at a

qualied specialist workshop.

Depending on driving style, the vehicle con-

sumes up to 0.8 litres of oil per 1000 km. The

oil consumption may also be higher than this

when the vehicle is new or if you frequently

drive at high engine speeds.

Maintenance and care

581

F247 0074 02

Turn cap 1 anti-clockwise and remove it.

Top up the engine oil.

Replace cap 1 and turn it clockwise until it

engages.

Check the oil level again (/ page 28).

Checking the coolant level

DANGER Risk of fatal injuries when carry-

ing out maintenance work during the

charging process

During the charging process, the high-voltage

on-board electrical system is under high volt-

age.

Do not perform any maintenance work

during the charging process.

WARNING Risk of burns when opening the

bonnet

If you open the bonnet in the event of an over-

heated engine or re in the engine compart-

ment, the following situations may occur:

You may come into contact with hot gases.

You may come into contact with other

escaping hot operating uids.

Before opening the bonnet, allow the

engine to cool down.

In the event of a re in the engine com-

partment, keep the bonnet closed and

call the re service.

WARNING Risk of injury due to moving

parts

Components in the engine compartment may

continue to run or start unexpectedly even

when the drive system is switched o.

Observe the following if you must open the

bonnet:

Switch o the vehicle.

Never touch the danger zones surround-

ing moving components, e.g. the rotation

area of the fan.

Remove jewellery and watches.

Keep items of clothing and hair away

from moving parts.

WARNING Risk of scalding from hot cool-

ant

If you open the cap, you could scald yourself.

Allow the engine to cool down before

opening the cap.

When opening the cap, wear protective

gloves and safety glasses.

Open the cap slowly to release pressure.

WARNING Risk of burns from hot compo-

nent parts in the engine compartment

Certain component parts in the engine com-

partment can be very hot, e.g. the engine, the

cooler and parts of the exhaust system.

582

Maintenance and care

F247 0074 02

Allow the engine to cool down and only

touch component parts described in the

following.

Park the vehicle on a level surface.

Check the coolant temperature display on the

driver's display.

The coolant temperature must be below 40°C.

Slowly turn cap 1 anti-clockwise to release

overpressure.

Continue turning cap 1 anti-clockwise and

remove it.

The coolant level is correct in the following cases:

If the engine is cold, the coolant is up to

marker bar

If the engine is warm, the coolant is up to

1.5 cm above marker bar

If necessary, top up with coolant that has

been approved for Mercedes-Benz.

Topping up the windscreen washer system

DANGER Risk of fatal injuries when carry-

ing out maintenance work during the

charging process

During the charging process, the high-voltage

on-board electrical system is under high volt-

age.

Do not perform any maintenance work

during the charging process.

WARNING Risk of burns when opening the

bonnet

If you open the bonnet in the event of an over-

heated engine or re in the engine compart-

ment, the following situations may occur:

You may come into contact with hot gases.

You may come into contact with other

escaping hot operating uids.

Before opening the bonnet, allow the

engine to cool down.

In the event of a re in the engine com-

partment, keep the bonnet closed and

call the re service.

WARNING Risk of injury due to moving

parts

Components in the engine compartment may

continue to run or start unexpectedly even

when the drive system is switched o.

Maintenance and care

583

F247 0074 02

Observe the following if you must open the

bonnet:

Switch o the vehicle.

Never touch the danger zones surround-

ing moving components, e.g. the rotation

area of the fan.

Remove jewellery and watches.

Keep items of clothing and hair away

from moving parts.

WARNING Risk of burns from hot compo-

nent parts in the engine compartment

Certain component parts in the engine com-

partment can be very hot, e.g. the engine, the

cooler and parts of the exhaust system.

Allow the engine to cool down and only

touch component parts described in the

following.

WARNING ‑ Risk of re and injury due to

windscreen washer concentrate

Windscreen washer concentrate is highly am-

mable. It could ignite if it comes into contact

with hot engine component parts or the

exhaust system.

Make sure that no windscreen washer

concentrate spills out next to the ller

opening.

Remove cap 1 by the tab.

Top up the washer uid.

Keeping the air/water duct free

Keep the area between the bonnet and the

windscreen free of deposits, e.g. ice, snow or

leaves.

584

Maintenance and care

F247 0074 02

Maintenance and care -> Engine compartment for Your Mercedes GLA SUV Second Generation (2020-2026)

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