engine MERCEDES-BENZ S-Class 2008 W221 Comand Manual

685 Practical hints
What to do if …?
Display
Possible cause/consequence
Possible solution
Close Doors
to Lock Vehicle
You wanted to lock the vehicle but not all
doors were closed.

Close doors and lock vehicle again.
Don’t Forget
Your Key
This display appears (for a maximum of
60 seconds) if the driver’s door is opened
with the engine turned off and no SmartKey
in the starter switch.
This message is only a reminder.

Take the SmartKey or SmartKey with
KEYLESS-GO* with you when leaving the ve-
hicle.
Take Your Key
From Ignition
You have forgotten to remove the
SmartKey.

Remove the SmartKey from the starter
switch.
Replace
Key Battery
The batteries in the SmartKey with
KEYLESS-GO* are discharged.

Replace the batteries (
page 712).
Key Detected
In Vehicle
A SmartKey with KEYLESS-GO* left in the
vehicle was recognized while locking the ve-
hicle from the outside.

Take the SmartKey with KEYLESS-GO* out of
the vehicle.

694 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Night View Assist
Lights ON or AUTO,
Not in R Gear
You have tried to switch on Night View As-
sist* but the light switch is not set to *
or B.
In addition, the automatic transmission is in
reverse gearR.

Turn the exterior lamp switch to * or
B (
page 399).

Shift the automatic transmission to park
positionP, neutral positionN or drive
positionD (
page 426).
Night View Assist
Only When
It Is Dark
You have tried to switch on Night View As-
sist* by daylight.
You can only switch on Night View Assist* when
it is dark.
Engine Oil Level Low
Stop Vehicle
Turn Engine Off
S 600 and S 65 AMG only:
There is no oil in the engine. There is a dan-
ger of engine damage.

Carefully bring the vehicle to a halt as soon
as it is safe to do so in a safe location.

Engage the electronic parking brake
(page 422).

Turn off the engine.

Add engine oil (
page 578) and check the
engine oil level (page 575).

695 Practical hints
What to do if …?
When the message “Check Engine Oil Level
at Next Refueling” (all models except S 600
and S 65 AMG) or “Check Engine Oil Level
(Add 1 quart). (Canada:1Liter)” (S 600
and S 65 AMG) appears while the engine is
running and at operating temperature, the
engine oil level has dropped to approxi-
mately the minimum level.When this occurs, the warning is at first in-
termittent and then remains on if the oil
level drops further.
Visually check for oil leaks. If there are no
obvious oil leaks, drive to the nearest ser-
vice station to refill engine oil to the re-
quired level with an approved oil.For information on approved engine oils,
refer to the Factory Approved Service
Products pamphlet (USA only) or contact
an authorized Mercedes-Benz Center.Display
Possible cause/consequence
Possible solution
Check
Engine Oil Level
(Add 1 quart)
(USA only)
Check
Engine Oil Level
(Add 1 Liter)
(Canada only)
S 600 and S 65 AMG only:
The engine oil level is too low.

Check the engine oil level (
page 575) and
add engine oil as required (page 578).

If you must add engine oil frequently, have
the engine checked for possible leaks.
Check
Engine Oil Level
at Next Refueling
All models except S 600 and S 65 AMG:
The engine oil level has dropped to approx-
imately the minimum level.

Check the engine oil level (
page 575) and
add engine oil as required (page 578).

If you must add engine oil frequently, have
the engine checked for possible leaks.
!
Engine oil level warnings should not be ig-
nored. Extended driving with the symbol dis-
played could result in serious engine damage
that is not covered by the Mercedes-Benz Limit-
ed Warranty.

696 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Engine Oil Level
Cannot Be
Measured
S600 and S65AMG only:
The measuring system is malfunctioning.

Have the measuring system checked by an
authorized Mercedes-Benz Center.
Engine Oil
Level Too High
S600 and S65AMG only:
You have added too much engine oil.
There is a risk of damaging:

the engine


the catalytic converter

Have excess oil siphoned or drained off. Con-
tact an authorized Mercedes-Benz Center.

704 Practical hintsWhat to do if …?Display
Possible cause/consequence
Possible solution
Shift to P
You have attempted to turn off the engine
with the KEYLESS-GO* start/stop button
and opened the driver’s door with the auto-
matic transmission not shift to park
positionP.

Shift the automatic transmission to park
positionP (
page 426).
or

Close the driver’s door.
You are driving with the trunk open.

Close the trunk (
page 512).
Check
Washer Fluid
The water level has dropped to approx.
1.1 US qts (1.0 l).

Add washer fluid (
page 580).

717 Practical hints
Replacing bulbs
Replacing bulbs for front lamps
Before you start to replace a bulb for a
front lamp, do the following first:
Turn the exterior lamp switch to M
(page 399).

Open the hood (
page 573).
1Cover 1
2Cover 2
3Cover 3Removing and installing washer fluid
reservoir on left-hand side
Vehicles with Airmatic*
You must remove the washer fluid reser-
voir in order to change the bulbs of the
front headlamp on the left-hand side. The
washer fluid reservoir is on the front
left-hand side of the engine compartment.
Washer fluid reservoir (example illustration
from S 550)1Retaining screwRemoving

Turn retaining screw1 counterclock-
wise.

Take washer fluid reservoir out of
mounting.

Place washer fluid reservoir to the side
and do not disconnect any wires or ca-
bles.
Installing

Guide washer fluid reservoir into
mounting so that the bottom retaining
lug slides into the rubber sleeve on the
longitudinal member.

Turn retaining screw1 clockwise.

723 Practical hints
Flat tire
Flat tire
Preparing the vehicle
Park the vehicle in a safe distance from
moving traffic on a hard, flat surface
when possible.

Turn on the hazard warning flasher
(page 405).

Turn the steering wheel so that the
front wheels are in a straight ahead
position.

Shift the automatic transmission to
park positionP.

Engage the electronic parking brake.

Turn off the engine.

Have any passenger exit the vehicle at
a safe distance from the roadway.

Vehicles with SmartKey: Remove the
SmartKey from the starter switch.
Vehicles with KEYLESS-GO*: Open the
driver’s door (this puts the starter
switch in position0, same as with the
SmartKey removed from the starter
switch). The driver’s door then can be
closed again.
Remove the KEYLESS-GO*
start/stop button from the starter
switch.
Mounting the spare wheel
i
Open the door only when conditions are safe
to do so.
Warning!
G
The dimensions of the spare wheel are dif-
ferent from those of the road wheels. As a
result, the vehicle handling characteristics
change when driving with a spare wheel
mounted. Adapt your driving style accord-
ingly.
The spare wheel is for temporary use only.
When driving with spare wheel mounted,
ensure proper tire inflation pressure and
do not exceed a vehicle speed
of 50 mph (80 km/h).
Contact the nearest Mercedes-Benz Center
as soon as possible to have the spare wheel
replaced with a regular road wheel.
Never operate the vehicle with more than
one spare wheel mounted.
Do not switch off the ESP
® when a spare
wheel is mounted.

725 Practical hints
Flat tire
The jack take-up brackets are located di-
rectly behind the front wheel housings and
in front of the rear wheel housings.
2Jack take-up bracket
3Jack
4Crank
Place jack2 on firm ground.

Position jack3 under take-up
bracket2 so that it is always vertical
(plumb-line) as seen from the side,
even if the vehicle is parked on an
incline.

Turn crank4 clockwise until jack3
is fully seated in take-up bracket2
and the jack base evenly meets the
ground.

Jack up the vehicle until the wheel is a
maximum of 1.2 in (3 cm) from the
ground. Never start engine while
vehicle is raised.
Warning!
G
Position the jack only on the jack take-up
brackets designed for this purpose.
If the jack is not properly positioned, the ve-
hicle may fall off the jack and cause serious
personal injury or damage to the vehicle.Warning!
G
The jack is intended only for lifting the
vehicle briefly for wheel changes. It is not
suited for performing maintenance work
under the vehicle.

Never start the engine when the vehicle
is raised.


Never lie down under the raised vehicle.

731 Practical hints
Batteries
Starter battery (example illustration from
S 550)1Negative terminal
2Positive terminal
Disconnecting starter battery
Secure vehicle in place with electronic
parking brake (
page 422).

Shift the automatic transmission to
park positionP (
page 426).
Do not rub the battery with rags or cloths.
The battery could explode if touched due to
electrostatic charge or due to spark forma-
tion.!
Switch off the engine and switch off the ve-
hicle’s internal electrical functions (
page 732)
before you disconnect or remove the battery’s
terminal clamps. You could otherwise destroy
electronic assemblies such as the generator.
Have the battery checked regularly by an autho-
rized Mercedes-Benz Center. Refer to Mainte-
nance Booklet for maintenance intervals or
contact an authorized Mercedes-Benz Center for
further information.
!
Do not connect any consumers directly to
the starter battery. The starter battery will other-
wise be discharged.
i
Only replace a discharged battery with a bat-
tery recommended by Mercedes-Benz. The con-
sumer battery is installed in the trunk in such a
way that it is safeguarded as much as possible
against mechanical destruction in the event of
an accident.
i
Remove SmartKey from starter switch (vehi-
cles with KEYLESS-GO*: Make sure the vehicle’s
on-board electronics have status 0)
(
page 370) when you turn off the engine and
no longer require any electrical consumers. The
vehicle then uses very little power and the con-
sumer battery is spared.
i
If the consumer battery is discharged, you
must use the mechanical key to unlock the vehi-
cle (page 708). Since the vehicle has a sepa-
rate starter battery, however, you can still start
the vehicle.
!
Always disconnect the starter battery in the
order described below. You could otherwise
damage the vehicle’s electronics.
!
Switch off the vehicle’s internal electrical
functions before disconnecting the starter bat-
tery. If the vehicle is stationary for more than one
hour with the SmartKey removed, you do not
need to switch off the vehicle’s internal electrical
functions.

733 Practical hints
Batteries
Starter battery
Connect the switched-off charging de-
vice to the terminals of the starter bat-
tery. Observe the operating
instructions in the manual for the
charging device while doing so.
Reinstalling starter battery
Install starter battery in engine com-
partment.

Swing retaining bar down.
Reconnecting starter battery

Make sure that the consumer battery in
the trunk is correctly installed and con-
nected.

Turn SmartKey in starter switch to po-
sition 0 and remove.

Connect the positive lead and fasten its
cover2 (
page 731).

Connect negative lead1
(page 731).

Attach ventilation tube.

Switch on the ignition (
page 370).

Start the engine (
page 416).

Check vehicle functions.
!
Only use charging devices with a maximum
charging voltage of 14.8 V.
Warning!
G
During the charge procedure, there is a risk
of acid burns due to gases escaping from
the battery. Do not bend over the battery
during the charge procedure.
!
The battery and the battery ventilation hose
must always be securely installed when the vehi-
cle is in operation.
!
Always connect the starter battery in the or-
der described below. Otherwise, the vehicle’s
electronics could be damaged.
Warning!
G
Do not drive without a properly installed and
connected consumer battery.
Have any work on the consumer battery car-
ried out by an authorized Mercedes-Benz
Center.
!
Never invert the terminal connections.
!
Make sure that the battery has a plug where
the ventilation tube is attached to it.