check engine MERCEDES-BENZ E-CLASS SALOON 2008 Owner's Manual

Troubleshooting
289Problem Possible cause/consequence Suggested solutions
±
The yellow engine diagnos-
tics warning lamp comes
on while the engine is run-
ning. There may be a malfunction:
R
in the fuel injection system
R in the exhaust system
R in the ignition system (on vehi-
cles with a petrol engine)
The emission limit values may be
exceeded and the engine may be
running in emergency mode. X
Have the vehicle checked as soon as possible at a qualified spe-
cialist workshop. H
The yellow tyre pressure
monitor* warning lamp is
on. G
Risk of accident
The tyre pressure monitor* has
detected a sudden or significant
pressure loss in at least one of
the tyres. X
Stop the vehicle without making any sudden steering or braking
manoeuvres. Pay attention to the traffic conditions as you do so.
X Observe the additional messages in the multi-function display
(Y page 257).
The warning light will go out after the flat tyre has been changed
and you have been driving for a few minutes. 1
The red SRS warning lamp
is lit while the engine is
running. G
Risk of injury
The restraint systems are faulty.
The airbags or belt tensioners
may either be triggered uninten-
tionally or, in the event of an acci-
dent, not be triggered at all. X
Visit a qualified specialist workshop immediately. Practical advice
* optional
211_AKB; 2; 5, en-GB
mkalafa
,V ersion: 2.9.4
2008-02-29T16:57:07+01:00 - Seite 289 ZDateiname: 6515_3416_02_buchblock.pdf; preflight

Troubleshooting
296 Problem Possible cause/consequence Suggested solutions
Vehicles with a petrol engine:
The engine is not running
smoothly and is misfiring. There is a malfunction in the
engine electronics or a mechani-
cal component of the engine con-
trol unit. X
Only depress the accelerator pedal slightly.
X Have the cause rectified immediately at a qualified specialist work-
shop.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it. A coolant temperature of over
120 °C is displayed. The coolant
warning lamp may also be on and
a warning tone may sound
(Y
page 120). The coolant level is too low. The
coolant is too hot and the engine
is no longer being cooled suffi-
ciently. X
Stop as soon as possible and allow the engine and the coolant to
cool down.
X Check the coolant level (Y page 225). Observe the warning notes
as you do so and top up the coolant if necessary. If the coolant level is correct, the
radiator fan may be faulty. The
coolant is too hot and the engine
is no longer being cooled suffi-
ciently. X
If the coolant temperature is less than 120 °C, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving on
mountain roads and stop/start driving. Practical advice
211_AKB; 2; 5, en-GB
mkalafa
,V ersion: 2.9.4
2008-02-29T16:57:07+01:00 - Seite 296 Dateiname: 6515_3416_02_buchblock.pdf; preflight

Troubleshooting
297Automatic transmission*
Problem Possible cause/consequence Suggested solutions
The transmission has problems
shifting gear The transmission is losing oil. X
Have the transmission checked at a qualified specialist workshop
immediately. The acceleration ability is deteri-
orating.
The transmission no longer
changes gear. The transmission is in emergency
mode.
It is only possible to shift into
2nd
gear and reverse gear. X
Stop the vehicle.
X Move the selector lever to P.
X Turn the key to position 0in the ignition lock.
X Wait at least 10 seconds before restarting the engine.
X Move the selector lever to position Dor R.
If D is selected, the transmission shifts into 2ndgear; if Ris selec-
ted, the transmission shifts into reverse gear.
X Have the transmission checked at a qualified specialist workshop
immediately. Practical advice
* optional
211_AKB; 2; 5, en-GB
mkalafa
,V ersion: 2.9.4
2008-02-29T16:57:07+01:00 - Seite 297 ZDateiname: 6515_3416_02_buchblock.pdf; preflight

Troubleshooting
302 Problem Possible cause/consequence Suggested solutions
The key cannot be turned in the
ignition lock. The key has been in position
0for
a considerable time. X
Remove the key and reinsert it into the ignition lock.
X Check the starter battery and recharge it if necessary
(Y page 329).
X Start the engine. The on-board voltage is too low. X
Switch off non-essential consumers, e.g. seat heating* or interior
lighting, and try to turn the key again.
If this does not work:
X Check the starter battery and recharge it if necessary
(Y page 329).
or
X Jump-start the vehicle (Y page 333).
or
X Consult a qualified specialist workshop. Practical advice
* optional
211_AKB; 2; 5, en-GB
mkalafa
,V ersion: 2.9.4
2008-02-29T16:57:07+01:00 - Seite 302 Dateiname: 6515_3416_02_buchblock.pdf; preflight

Troubleshooting
304 Problem Possible cause/consequence Suggested solutions
The vehicle cannot be started
using the KEYLESS GO key and
the KEYLESS GO button. The KEY-
LESS GO key is in the vehicle. A door is open. The key therefore
cannot be detected so easily. X
Close the door and try to start the vehicle again. You did not depress the brake
when starting the engine. X
Depress the brake and press the KEYLESS GO button. There is interference from a pow-
erful source of radio waves. X
Start your vehicle using the KEYLESS GO key in the ignition lock. You have lost the KEYLESS GO
key. X
Have the KEYLESS GO key cancelled at a Mercedes-Benz Service
Centre.
X Report the loss immediately to the vehicle insurers.
X If necessary, have the manual locks changed too. Auxiliary heating*
Problem Possible cause/consequence Suggested solutions
The auxiliary heating is not work-
ing. The fuel level is down to the
reserve level. X
Refuel at the nearest filling station. The battery is not sufficiently
charged. X
Charge the battery. The auxiliary heating is faulty. X
Have the auxiliary heating checked at a qualified specialist work-
shop. Practical advice
* optional
211_AKB; 2; 5, en-GB
mkalafa
,V ersion: 2.9.4
2008-02-29T16:57:07+01:00 - Seite 304 Dateiname: 6515_3416_02_buchblock.pdf; preflight

Jump-starting
334 G
Risk of injury
There is a risk of acid burns when jump-
starting a vehicle due to the gases which
escape from the battery. Do not lean over
the battery while the engine is being jump-
started. G
Risk of explosion
Gases escaping from the battery during
jump-starting may cause minor explosions.
Avoid creating sparks. Keep naked flames
away from the battery, and do not smoke.
Comply with safety precautions and take
protective measures when handling batter-
ies. You will find these under “Battery” in
the index.
X Make sure that the two vehicles do not
touch.
X Depress the parking brake.
X Manual transmission: engage neutral.
X Automatic transmission*: move the
selector lever to P.
X All vehicles: switch off all electrical con-
sumers. Saloon
1
Negative terminal on your vehicle
2 Positive terminal on your vehicle
3 Positive terminal of donor battery
4 Negative terminal of donor battery
X If your vehicle is being jump-started by
another vehicle, allow the other vehicle's
engine to idle.
X Connect positive terminal 2on your vehi-
cle to positive terminal 3of the donor
battery using the jump lead, beginning with
your own battery.
X Connect negative terminal 4of the donor
battery to negative terminal 1of your
vehicle's battery using the jump lead, con- necting the jump lead to the donor battery
first.
X Start the engine.
X When the engine is running, switch on a few
electrical consumers, e.g. the blower. Do
not switch on the lights.
X First disconnect the jump lead from nega-
tive terminals 1and 4, then from positive
terminals 2and 3each time beginning
with your vehicle's battery.
X Have the battery checked at a qualified
specialist workshop, e.g. a Mercedes-Benz
Service Centre. Practical advice
* optional
211_AKB; 2; 5, en-GB
mkalafa,
Version: 2.9.4
2008-02-29T16:57:07+01:00 - Seite 334 Dateiname: 6515_3416_02_buchblock.pdf; preflight

Jump-starting
335
Estate
1
Cover
2 Rotary catches
X Turn three rotary catches 2through a
quarter turn.
X Remove cover 1forwards. 1
Earth point on your vehicle
2 Positive terminal on your vehicle (under
cover)
X If your vehicle is being jump-started by
another vehicle, allow the other vehicle's
engine to idle.
X Connect the positive terminals of the two
batteries using the jump lead, beginning
with your own battery.
X Connect the negative terminal of the donor
battery to the body earth point using the
jump lead, connecting the jump lead to the
negative terminal of the donor battery first.
X Start the engine.
X When the engine is running, switch on a few
electrical consumers, e.g. the blower. Do
not switch on the lights. X
Remove the jump lead from earth point
1 on your own vehicle and from the neg-
ative terminal of the donor vehicle first,
then from the positive terminals, beginning
with your vehicle's battery.
X Have the battery checked at a qualified
specialist workshop, e.g. a Mercedes-Benz
Service Centre. Jump-starting another vehicle
You can jump-start another vehicle which has
a flat battery. Observe the following points:
R Only 12 V batteries can be jump-started.
R Do not jump-start frozen batteries. Allow
the battery to thaw first.
R Observe the requirements for the other
vehicle.
R Only use jump leads which are protected
against polarity reversal and which have a
sufficient cross-section and insulated ter-
minal clamps. G
Risk of acid burns
There is a risk of acid burns when jump-
starting a vehicle due to the gases which
escape from the battery. Do not lean over Practical advice
211_AKB; 2; 5, en-GB
mkalafa,
Version: 2.9.4
2008-02-29T16:57:07+01:00 - Seite 335 ZDateiname: 6515_3416_02_buchblock.pdf; preflight