138 Driving and operatingFault9 WarningIf there is a fault in the ABS, thewheels may be liable to lock dueto braking that is heavier thannormal. The advantages of ABSare no longer available. Duringhard braking, the vehicle can nolonger be steered and mayswerve.Have the cause of the fault remediedby a workshop.Parking brakeManual parking brakeAlways apply parking brake firmlywithout operating the release button,and apply as firmly as possible ona downhill or uphill slope.To release the parking brake, pull thelever up slightly, operate the releasebutton and fully lower the lever.To reduce the operating forces of theparking brake, depress the foot brakeat the same time.Control indicator R 3 86.Electrical parking brakeApplying when vehicle is stationaryPull switch m, the electrical parkingbrake operates automatically with anadequate force. For maximum force,e.g. when parking with trailer or oninclines, pull switch m twice.The electrical parking brake canalways be activated, even if theignition is off.Do not operate electrical parkingbrake system too often withoutrunning the engine as this willdischarge the battery.
