Instruments and Indicator/Warning Lights 36Further information about ABS ⇒page 159, “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 ⇒.
The following text will be displayed in the information display*:
STOP BRAKE FAULT OWNER'S MANUAL!
WARNING
•
If the brake system warning light
comes on together with the ABS
warning light
stop the vehicle immediately and check the brake fluid
level in the reservoir ⇒page 191, “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 instructions before checking the brake
fluid level and opening the bonnet ⇒page 185, “Working in the engine
compartment”.
•
If the brake fluid is at the correct level, the ABS control function has
failed. The rear wheels may then block very rapidly when braking. In certain
circumstances, this can result in the rear end of the car breaking away - risk
of skidding! Drive carefully to the nearest specialist garage and have the
fault rectified.
Brake system
The warning light
flashes or comes on if the brake fluid level is too low, if there
is a fault in the ABS or if the handbrake is applied.
If the warning light flashes (handbrake is not applied), stop and check the brake
fluid level ⇒.
The following text will be displayed in the information display*:
STOP BRAKE FLUID SERVICE MANUALIf there is a fault in the ABS which also influences the function of the normal brake
system (e.g. distribution of brake pressure), the ABS warning light
comes on
together with the brake system warning light
. Be aware that not only the ABS but
also another part of th brake system is defective ⇒.
3 peeps sound as an additional warning signal.
One should get used to high pedal forces, an extended free play of the brake pedal
and long braking distances when carefully driving to the specialist garage.
The following text will be displayed in the information display*:
STOP BRAKE FAULT OWNER'S MANUAL!
For further information on the brake system ⇒page 158, “Brakes”.
Handbrake applied
The warning light
also comes on if the handbrake is applied. An audible warning
is also given if you drive the vehicle for at least 3 seconds at a speed of more than 6
km/h.
The following text will be displayed in the information display*:
HANDBRAKE ON
WARNING
•
Pay attention to the following instructions before checking the brake
fluid level and opening the bonnet ⇒page 185, “Working in the engine
compartment”.
•
If the brake system warning light
does not go out a few seconds after
switching on the ignition or comes on when driving, stop immediately and
check the brake fluid in the reservoir ⇒page 191, “Brake fluid”. If the fluid
level has dropped below the MIN marking, do not drive any further - risk of
accident! Obtain professional assistance.
Airbag system
Monitoring the airbag system
The warning light
comes on for a few seconds when the ignition is switched on.
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Breakdown assistance 210
– Tighten the wheel bolts firmly, alternately and diagonally using the
wheel wrench ⇒page 211.
– 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, ensure that the tyres rotate in the correct
direction ⇒page 198.
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. The tightening torque for steel and light
alloy wheels must be 120 Nm.
– Have the defective tyre repaired as soon as possible.
WARNING
It is necessary to observe the guidelines given on ⇒page 200, “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
difficult 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 tight-
ening torque can be checked.
Full wheel trim*Pulling off
– Hook the clamp found in the vehicle tool kit into the reinforced edge
of the full wheel trim.
– Push the wheel key through the clamp, support the wheel key on the
tyre and pull off the wheel trim ⇒fig. 190.
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.
Fig. 190 Removing the full
wheel trim
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