140Driving
● Vehicle modifications (e.g. to the engine, brakes, frame or a combina-
tion of wheels and tyres) could impair the brake assist systems
⇒ page 195, Accessories, modifications and spare parts.
● In the event of a fault in the ABS system, the ESC, ASR and EDL are
switched off automatically. A fault in the ABS is indicated by the
⇒ page 70 warning lamp.
Brakes
Wear
The rate of wear of the brake pads depends on the driving style and on the
way in which the vehicle is used. The brake pads will wear more quickly if
you use your vehicle frequently in urban traffic and short trips or drive in a
sporty style. Under these demanding conditions, visit your specialised serv-
ice, even before the scheduled service date, so that the thickness of the
brake pads can be measured.
Wet roads or road salt
If brakes are wet or frozen, or if you are driving on roads which have been
gritted with salt, braking power may set in later than normal. Dry the brakes
as soon as possible by braking repeatedly.
Corrosion
Long periods of inactivity and little use can lead to rust on the brake discs
and dirt on the brake pads. Where the brake system is subjected to light
stress or in the case of corrosion, clean the brake discs by braking fully sev-
eral times at a high speed.
Brake system fault
If you notice that the braking distance suddenly increases and the brake
pedal can be pressed down more fully, there may be a fault in the brake sys-
tem. Visit a specialised service immediately and adjust your driving style to
the extent of the damage and to limit the effect of the brakes. Low brake fluid level
Insufficient brake fluid could cause faults in the brake system. The brake flu-
id level is controlled electronically
⇒ page 66, Brake system .
Brake servo
The brake servo supplements the pressure you exert on the brake pedal.
The brake servo only works when the engine is running.
Handbrake
Fig. 103 Centre console:
handbrake
Applying the handbrake
– Pull the handbrake lever up all the way.
Releasing the handbrake
– Pull the handbrake lever up slightly and press the unlock button
at the same time ⇒ Fig. 103.
– Keep the button pressed down and push the lever all the way
down.
