Get Maintenance and care -> Engine compartment Guide for Mercedes CLA 4 Door Second Generation (2019-2024)

Switch o the vehicle.

Never touch the danger zones surround-

ing moving components, e.g. the rotation

area of the fan.

Remove jewelery and watches.

Keep items of clothing and hair away

from moving parts.

WARNINGARNING Risk of injury from touching live

components

The ignition system and the fuel injection sys-

tem operate with a high voltage. You could

receive an electric shock.

Never touch components of the ignition

system or fuel injection system when the

vehicle 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

WARNINGARNING 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.

WARNINGARNING Risk of injury from using the

windshield wipers when the hood is open

If the windshield wipers start moving when the

hood is open, you could be trapped by the

wiper linkage.

Always switch o the windshield wipers

and the vehicle rst if you need to open

the hood.

Opening tOpening the hoodhe hood

To release the hood, pull on handle 1.

Maintenance and care

261

Push yellow handle 1 on the hood catch to

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

Li the hood until it is automatically raised by

the pneumatic spring.

Closing t

Closing the hoodhe hood

Lower the hood and let it drop from a height of

approximately 8 in (20 cm).

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

hood again and close it with a little force until

it engages correctly.

Engine oilEngine oil

ChecChecking tking the engine oil levhe engine oil level using tel using the on-boardhe on-board

comcomputputerer

RReqequiruirements:ements:

The engine has been warmed up.

The vehicle is parked on a level surface.

The engine is running at idle speed.

The hood is closed.

The engine oil level is determined during driving.

Determining the engine oil level can take up to

30 minutes with a normal driving style and even

longer with an active driving style.

On-board computer:

Service

Engine Oil Level

One of the following messages will appear on the

instrument display:

Measuring Engine Oil Level...: measurement

of the oil level is not yet possible.

Repeat the request aer a maximum of

30 minutes' driving.

Engine Oil Level OK and the bar display for

indicating the oil level on the instrument dis-

play is green and is between "min" and "max":

the oil level is correct.

Engine Oil Level Add 1,1 qts. and the bar dis-

play for indicating the oil level on the instru-

ment display is orange and is below "min":

Add 1.1 US qt (1 l) of engine oil.

Reduce Engine Oil Level and the bar display

for indicating the oil level on the instrument

display is orange and is above "max":

262262

Maintenance and care

Drain o any excess engine oil that has been

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

workshop.

For Engine Oil Level Switch Ignition On

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 Unavail.

Close the hood.

Topping up engine oilopping up engine oil

WARNINGARNING 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.

WARNINGARNING 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.

NOOTETE 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.

NOOTETE Damage caused by relling too

much engine oil

Too much engine oil can damage the engine or

the catalytic converter.

Have excess engine oil removed at a

qualied specialist workshop.

Depending on driving style, the vehicle con-

sumes up to 0.9 US qt (0.8 liter) of oil per

600 miles (1000 km). The oil consumption

may be higher than this when the vehicle is

new or if you frequently drive at high engine

speeds.

Maintenance and care

263

Turn cap 1 counter-clockwise and remove it.

Add engine oil.

Replace cap 1 and turn it clockwise until it

engages.

Check the oil level again (/ page 262).

ChecChecking tking the coolant levhe coolant levelel

WARNINGARNING 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.

WARNINGARNING Risk of scalding from hot cool-

ant

If you open the cap, you could be scalded.

Let the motor cool down before opening

the cap.

When opening the cap, wear protective

gloves and safety glasses.

Open the cap slowly to release pressure.

Park the vehicle on a level surface.

Check the coolant temperature display in the

instrument cluster.

The coolant temperature must be in the bot-

tom quarter of the temperature display.

Slowly turn cap 1 counter-clockwise to

release overpressure.

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Maintenance and care

Continue turning cap 1 counter-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

0.6 in (1.5 cm) over the marker bar

If necessary, add coolant that has been

approved for Mercedes-Benz.

Further information on coolant (/ page 334)

RRellingelling tthe windshield whe windshield washer systasher systemem

WARNINGARNING 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.

WARNINGARNING ‑ Risk of re and injury from

windshield washer concentrate

Windshield 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 windshield washer

concentrate spills out next to the ller

opening.

Remove cap 1 by the tab.

Add washer uid.

Further information about the windshield

washer uid (/ page 335)

Maintenance and care

265

KKeeping teeping the airhe air-w-watater duct frer duct freeee

Keep the area between the hood and the

windshield free of deposits, e.g. ice, snow and

leaves.

ChecChecking tking the brhe brakakepad tepad thichicknesskness

Bring the vehicle and wheels into a suitable

position so that you can position the gauge.

The positioning of gauge 3 depends on the

vehicle equipment. The gauge is positioned at

point

3, which is located either in the center

of the brakepad or at the upper end to the

side, depending on the brake caliper.

Switch o the engine.

Secure the vehicle against rolling away.

Take the gauge out of the vehicle document

wallet in the glove box.

Place the gauge between the wheel's spokes

in position 3 on the brakepad.

Hold the gauge vertically to the brake disc and

slide measuring pin 2 onto brake disc 1.

Check which color eld 4 the arrow on

measuring pin is pointing to.

Green:een: the brakepad thickness is sucient.

Red:ed: the brakepad thickness is not sucient.

Have the brakepads checked at a qualied

specialist workshop.

To avoid an inaccurate measurement:

Make sure the wheels are suitably posi-

tioned.

In the case of perforated brake discs, do

not put the measuring pin on one of the

bores in the brake disc.

Cleaning and careCleaning and care

NNoottes on wes on washing tashing the vhe vehicle in a car wehicle in a car washash

WARNINGARNING Risk of accident due to

reduced braking eect aer washing the

vehicle

The braking eect is reduced aer washing

the vehicle.

Aer the vehicle has been washed, brake

carefully while paying attention to the

trac conditions until the braking eect

has been fully restored.

266266

Maintenance and care

Maintenance and care -> Engine compartment for Your Mercedes CLA 4 Door Second Generation (2019-2024)

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