Get Maintenance and care -> Engine compartment Guide for Mercedes E Class 4 Door 2022

Maintenance and care

275

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When the engine is oꢀen leꢀ idling for long

periods

Operation in particularly dusty conditions

and/or if air-recirculation mode is frequently

used

Engine compartment

Opening and closing the hood

&

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:

&

WARNING Risk of accident due to driving

with the hood unlocked

In these or similar operating conditions, have the

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

for example, changed more frequently. The tires

must be checked more frequently if the vehicle is

operated under increased loads. Further informa-

tion can be obtained at a qualiꢁed specialist work-

shop.

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The hood may open and block your view.

You may come into contact with hot gases.

You may come into contact with other

escaping hot operating ꢂuids.

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Never release the hood when driving.

Before every trip, ensure that the hood is

locked.

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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.

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WARNING Risk of accident and injury

when opening and closing the hood

Battery disconnection periods

The hood may suddenly drop into the end

position.

There is a risk of injury for anyone in the

hood's range of movement.

The ASSYST PLUS service interval display can cal-

culate the service due date only when the battery

is connected.

&

WARNING Risk of injury due to moving

parts

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Do not open or close the hood if there is

a person in the hood's range of move-

ment.

Components in the engine compartment may

continue to run or start unexpectedly even

when the drive system is switched oꢃ.

Display and note down the service due date

on the instrument display before disconnect-

ing the battery (/ page 274).

Observe the following if you must open the

hood:

Maintenance and care

Switch oꢃ 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.

276

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Electric lines to the ignition coils and the fuel

injectors

Opening the hood

#

&

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 touching live

components

The ignition system and the fuel injection sys-

tem operate with a high voltage. You could

receive an electric shock.

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WARNING Risk of injury from using the

windshield wipers when the hood is open

#

Never touch components of the ignition

system or fuel injection system when the

vehicle is switched on.

If the windshield wipers start moving when the

hood is open, you could be trapped by the

wiper linkage.

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To release the hood, pull on handle 1.

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Always switch oꢃ the windshield wipers

and the vehicle ꢁrst if you need to open

the hood.

The live components include the following, for

example:

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Ignition coils

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Fuel injectors

Maintenance and care

277

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If the hood can still be liꢀed slightly, open the

The waiting time before checking the oil level

hood again and close it with a little more force when the engine is at normal operating tempera-

until it engages correctly.

ture is ꢁve minutes.

Engine oil

Checking the engine oil level using the oil dipstick

&

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.

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Push handle 1 of the hood catch upwards

and liꢀ the hood until it opens automatically.

Requirements:

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Closing the hood

The engine has an oil dipstick. If not, the

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Park the vehicle on a level surface.

Pull oil dipstick 1 out and wipe oꢃ.

engine oil level can be checked only with the

on-board computer (/ page 278) .

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Lower the hood to a height of around 8 in

(20 cm) and then allow it to fall, applying a lit-

tle force as you let it go.

#

Depending on the engine, the oil dipstick may be

installed in the engine compartment in diꢃerent

locations.

Maintenance and care

278

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Slowly slide oil dipstick 1 into the guide tube 30 minutes with a normal driving style and even

Drain oꢃ any excess engine oil that has been

added. To do so, consult a qualiꢁed specialist

workshop.

longer with an active driving style.

On-board computer:

to the stop, and pull it out again aꢀer approx-

imately three seconds.

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Oil level is correct: oil level is between 2

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For Engine Oil Level Switch Ignition On

4

5

Service

Engine Oil Level

and 3.

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One of the following messages will appear on the

instrument display:

Switch on the vehicle to check the engine oil

level.

Engine Oil Level System Inoperative: The oil

level sensor is defective or not connected.

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Oil level too low: oil level is at 3 or below.

Oil level too high: oil level is above 2.

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Measuring Engine Oil Level...: measurement

of the oil level is not yet possible.

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If the oil level is too low, add 1.1 US qt (1 liter)

of engine oil.

If the oil level is too high, drain oꢃ excess

engine oil. Consult a qualiꢁed specialist work-

shop.

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Repeat the request aꢀer a maximum of

30 minutes' driving.

Consult a qualiꢁed specialist workshop.

Engine Oil Level System Currently Unavail.

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Engine Oil Level OK and the bar display for

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Close the hood.

indicating the oil level on the instrument dis-

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

the oil level is correct.

CChheeccking the engine oil level using the on-board

ccoomputer

Reꢁlling engine oil

&

WARNING Risk of burns from hot compo-

nent parts in the engine compartment

Requirements:

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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":

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The engine has been warmed up.

The vehicle is parked on a level surface.

Certain component parts in the engine com-

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

cooler and parts of the exhaust system.

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The engine is running at idle speed.

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

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The hood is closed.

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Reduce Engine Oil Level and the bar display

for indicating the oil level on the instrument

display is orange and is above "max":

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Allow the engine to cool down and only

touch component parts described in the

following.

The engine oil level is determined during driving.

Determining the engine oil level can take up to

Maintenance and care

279

&

*

WARNING Risk of ꢁre and injury from

engine oil

NOTE Damage caused by reꢁlling too

much engine oil

If engine oil comes into contact with hot com-

ponent parts in the engine compartment, it

may ignite.

Too much engine oil can damage the engine or

the catalytic converter.

#

Have excess engine oil removed at a

qualiꢁed specialist workshop.

#

Make sure that no engine oil is spilled

next to the ꢁller opening.

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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.

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Allow the engine to cool oꢃ 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 speciꢁcations

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.

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Turn cap 1 counter-clockwise and remove it.

Add engine oil.

Replace cap 1 and turn it clockwise until it

engages.

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Check the oil level again (/ page 277).

Do not use additives.

Maintenance and care

280

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Checking the coolant level

Continue turning cap 1 counter-clockwise

and remove it.

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WARNING Risk of burns from hot compo-

nent parts in the engine compartment

The coolant level is correct in the following cases:

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If the engine is cold, the coolant is up to

marker bar 2.

If the engine is warm, the coolant is up to

0.6 in (1.5 cm) over the marker bar 2.

Certain component parts in the engine com-

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

cooler and parts of the exhaust system.

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#

Allow the engine to cool down and only

touch component parts described in the

following.

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If necessary, add coolant that has been

approved for Mercedes-Benz.

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Further information on coolant (/ page 349)

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WARNING Risk of scalding from hot cool-

ant

Reꢁlling the windshield washer system

If you open the cap, you could be scalded.

#

&

WARNING Risk of burns from hot compo-

nent parts in the engine compartment

Let the motor cool down before opening

the cap.

When opening the cap, wear protective

gloves and safety glasses.

#

Park the vehicle on a level surface.

Check the coolant temperature display in the

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Certain component parts in the engine com-

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

cooler and parts of the exhaust system.

instrument cluster.

The coolant temperature must be in the bot-

tom quarter of the temperature display.

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Open the cap slowly to release pressure.

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Allow the engine to cool down and only

touch component parts described in the

following.

Slowly turn cap 1 counter-clockwise to

release overpressure.

Maintenance and care

281

Keeping the air-water duct free

&

WARNING ‑ Risk of ꢁre and injury from

windshield washer concentrate

#

Keep the area between the hood and the

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

leaves.

Windshield washer concentrate is highly ꢂam-

mable. It could ignite if it comes into contact

with hot engine component parts or the

exhaust system.

Cleaning and care

Notes on washing the vehicle in a car wash

#

Make sure that no windshield washer

concentrate spills out next to the ꢁller

opening.

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WARNING Risk of accident due to

reduced braking eꢃect aꢀer washing the

vehicle

The braking eꢃect is reduced aꢀer washing

the vehicle.

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Aꢀer the vehicle has been washed, brake

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Remove cap 1 by the tab.

carefully while paying attention to the

traꢄc conditions until the braking eꢃect

has been fully restored.

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Add washer ꢂuid.

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Further information about the windshield

washer ꢂuid (/ page 350)

Maintenance and care -> Engine compartment for Your Mercedes E Class 4 Door 2022

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