Instruments and warning lights
30
In this case have the engine inspected without delay by a specialist garage.
The following text will be displayed in the information display*:
OIL SENSOR WORKSHOP!
WARNING
If you must stop for technical reasons, then park the vehicle at a safe
distance from the traffic and switch off the engine and switch on the hazard
warning light system page 48.
The red oil pressure light
is not an oil level indicator! One should there-
fore check the oil level at regular inte rvals, preferably after every refueling
stop.
Open door*
The warning light
comes on, if one or several doors are opened.
The warning light on vehicles fitted with information display comes on when switching
the ignition off. If a door or the boot lid is opened.
The warning light on vehicles fitted with information display goes out after switching
the ignition off.
Antilock brake system (ABS)*
The warning light
shows the functionality of the ABS and the Electronic Differential
Lock (EDL)*.
The warning light comes on for a few seconds after the ignition has been switched on
or when starting the engine. The warning light goes out after an automatic check
sequence has been completed.
A fault in the ABS
The system is not functioning properly if the ABS warning light
does not go out
within a few seconds after switching on the ignition, does not light up at all or lights up
while driving. The vehicle will only be br aked by the normal brake system. Visit a
specialist garage as quickly as possible and adjust your style of driving to take account of the fault in the meantime since you will no
t know the extent of the fault and in how
far the effect of the antilock brakes is affected.
Further information about ABS page 126, “Antilock brake system (ABS)*”.
A fault in the entire brake system
If the ABS warning light
comes on together with the brake system warning light
(handbrake must be released), there is a fault not only in the ABS but also in another
part of the brake system .
Electronic Differential Lock (EDL)*
The EDL is a part of the ABS. A fault in the EDL is indicated by the lighting up of the ABS
warning light
in the instrument cluster. Have the vehicle inspected immediately by
your nearest specialist garage.
Models fitted with ESP are equipped with electronic differential lock (EDL).
If a significant fault occurs in the ABS syst em, a warning signal sounds additionally (3
peeps).
Further information on the EDL page 124.
WARNING
If the brake system warning light
comes on together with the ABS
warning light
stop the vehicle immediately an d check the brake fluid level in
the reservoir page 154, “Brake fluid”. If the fluid level has dropped below the
MIN marking, do not drive any further - risk of accident! Obtain professional
assistance.
Pay attention to the following instruct ions before checking the brake fluid
level and opening the bonnet page 148, “Working in the engine compart-
ment”.
If the brake fluid is at the correct leve l, the ABS control function has failed.
The rear wheels may then block very rapi dly when braking. In certain circum-
stances, this can result in the rear end of the car breaking away - risk of skid-
ding! Drive carefully to the nearest sp ecialist garage and have the fault
rectified.
s2rc.book Page 30 Thursd ay, April 22, 2010 10:58 AM
Breakdown assistance
170
– Tighten the wheel bolts firmly, alternately and diagonally using the wrench* (cross-
wise) page 171.
– Mount the full wheel trim/wheel trim cap or the caps.
Note
All bolts must be clean and must turn easily.
You must never grease or oil the wheel bolts!
When fitting on unidirectional tyres, ensu re that the tyres rotate in the correct
direction page 160.
Subsequent stepsAfter changing the wheel, you must perform the following steps.
– Stow and attach the replaced wheel in the spare wheel well.
– Stow the vehicle tool kit in the space provided.
– Check the tyre pressure on the spare wheel* just mounted as soon as possible.
– Have the tightening torque of the wheel bolts checked with a torque wrench as
soon as possible. Steel and light alloy wh eels must be tightened to a tightening
torque of 120 Nm .
– Have the defective tyre repaired as soon as possible.
WARNING
It is necessary to observe the guidelines given on page 162, “New tyres and
wheels” if the vehicle is subsequently fitted with tyres which are different to
those it was fitted with at the works.
Note
If you find, when changing the wheel, that the wheel bolts are corroded and diffi-
cult to turn, the bolts must be replaced before checking the tightening torque.
Drive cautiously and only at a moderate speed to a workshop where the tightening
torque can be checked.
Full wheel trim*Pulling off– Hook the clamp found in the vehicle tool ki t into the reinforced edge of the full
wheel trim.
– Push the wheel wrench* through the clamp, support the wheel wrench at the tyre and pull off the wheel trim fig. 160 .Installing– First press the full wheel trim onto the wheel at the valve opening provided. Then
press the full wheel trim into the wheel in such a way that its entire circumference
locks correctly in place.
Caution
Use the pressure of your hand, do not knock on the full wheel trim! Heavy knocks
mainly on the points where the full wheel trim has not been inserted into the wheel,
can result in damage to the guide and centering elements of the full wheel trim.
Check for yourself that the safety wheel bolt * is located in the hole in the area of
the valve before fitting the full wheel trim onto a steel wheel which is attached with a
safety wheel bolt* page 172, “Securing wheels against being stolen*”.
Fig. 160 Removing the full
wheel trim
s2rc.book Page 170 Thursday, April 22, 2010 10:58 AM
