Get Maintenance and care -> Engine compartment Guide for Mercedes G Class SUV Fourth Generation (2019-2024)

When the engine is oen le idling for long

periods

Operation in particularly dusty conditions

and/or if air-recirculation mode is frequently

used

In these or similar operating conditions, have the

interior air lter, air lter, engine oil and oil lter,

for example, changed more frequently. If subject

to increased stress, check the tires more. Further

information can be obtained at a qualied special-

ist workshop.

Battery disconnection periods

The ASSYST PLUS service interval display can cal-

culate the service due date only when the battery

is connected.

Display and note down the service due date

on the instrument display before disconnect-

ing the battery (/ page 316).

Engine compartment

Opening and closing the hood

WARNING Risk of accident due to driving

with the hood unlocked

The hood may open and block your view.

Never release the hood when driving.

Before every trip, ensure that the hood is

locked.

WARNING Risk of accident and injury

when opening and closing the hood

The hood may suddenly drop into the end

position.

There is a risk of injury for anyone in the

hood's range of movement.

Do not open or close the hood if there is

a person in the hood's range of move-

ment.

WARNING Risk of burns when opening the

hood

If you open the hood 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 hood, allow the

engine to cool down.

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

partment, keep the hood closed and call

the re service.

WARNING Risk of injury due to moving

parts

Components in the engine compartment can

continue to run or start unexpectedly even

when the ignition is switched o.

Observe the following before performing tasks

in the engine compartment:

Maintenance and care

317

Switch o the ignition.

Never touch the danger zone 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.

WARNING 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

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

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 vehicle before opening the hood.

Opening the hood

To release the hood, pull on handle 1.

318

Maintenance and care

Push handle 1 of the hood catch upwards

and li the hood by approximately 15 in

(40 cm).

The hood will be opened and held open auto-

matically by the pneumatic spring.

Closing the hood

Lower the hood until the hood catch engages.

Then, press the hood rmly into the lock with

both hands until it is completely closed.

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

hood again and repeat the previous step until

it engages correctly.

Engine oil

▌Checking the engine oil level using the on-

board computer

Requirements:

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.

Before every o-road drive, ll the engine oil

level up to the maximum.

Wait at least ve minutes aer the initial

check using the on-board computer. Aer

this, make a second request and add engine

oil according to the specications.

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.

If the bar is at "min": add approximately

1.1 US qt (1 l) of engine oil.

If the bar is in the middle: add approximately

0.5 US qt (0.5 l) of engine oil.

Engine Oil Level Add 1.0 l and the bar display

for indicating the oil level on the instrument

display is orange and is below "min":

Maintenance and care

319

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":

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.

▌Relling engine oil

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 adding too

much engine oil

Excessive engine oil can damage the engine or

the catalytic converter.

Have excess engine oil removed in a

qualied specialist workshop.

320

Maintenance and care

Depending on driving style, the vehicle con-

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

600 miles (1,000 km). The oil consumption

may also be higher than this when the vehicle

is new or if you frequently drive at high engine

speeds.

Turn cap 1 counter-clockwise and remove it.

Rell engine oil.

Replace cap 1 and turn it clockwise until it

engages.

Check the oil level again (/ page 319).

Checking the coolant level

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 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 on the

instrument display.

The coolant temperature must be in the bot-

tom quarter of the temperature indicator.

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321

Slowly turn cap 1 counter-clockwise to

release overpressure.

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, rell with coolant that has been

approved for Mercedes-Benz.

Further information on coolant (/ page 384).

Filling the windshield washer system

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

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.

Turn cap 1 counter-clockwise and remove it.

Add washer uid.

Replace cap 1 and turn it clockwise until it

engages.

322

Maintenance and care

Maintenance and care -> Engine compartment for Your Mercedes G Class SUV Fourth Generation (2019-2024)

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