2009 Mercedes GL-Class Owner's Manual - Page 53
2009 Mercedes GL-Class Manual
Page 53 highlights
463_AKB; 2; 52, en-US d2ureepe, 2008-12-02T10:52:11+01:00 - Seite 51 Version: 2.11.7.1 Driving safety systems Make sure the differential locks are switched on at all times except when driving off-road for example. Switch on the differential locks immediately when returning from off-road driving. 51 functions as a reminder to take extra care while driving. Emergency brake maneuver ABS G Observe Safety notes, see page 50. G Warning! Do not pump the brake pedal. Use firm, steady brake pedal pressure instead. Pumping the brake pedal defeats the purpose of the ABS and significantly reduces braking effectiveness. G Warning! If the ABS malfunctions, other driving safety systems such as the BAS or the ESP® are also switched off. Observe indicator and warning lamps that may come on as well as messages in the multifunction display that may appear. If the ABS malfunctions, the wheels may lock during hard braking, reducing steering capability and extending the braking distance. The Antilock Brake System (ABS) regulates the brake pressure so that the wheels do not lock during braking. This allows you to maintain the ability to steer your vehicle. The ABS is functional above a speed of approximately 5 mph (8 km/h) independent of road surface conditions, provided the differential locks are not engaged. On slippery road surfaces, the ABS will respond even to light brake pressure. The ! indicator lamp in the instrument cluster comes on when you switch on the ignition. It goes out when the engine is running. LOW-RANGE ABS During off-road driving, a special low-range system for the ABS is operational with the transfer case in position LOW (Y page 91). An improved braking action (dig-in effect) is obtained for vehicles speeds of up to 37 mph (60 km/h) through a change in the ABS control function. BAS The Brake Assist System (BAS) operates in emergency situations. If you apply the brakes very quickly, the BAS automatically provides full brake boost, thereby potentially reducing the braking distance. X Apply continuous full braking pressure until the emergency braking situation is over. The ABS will prevent the wheels from locking. When you release the brake pedal, the brakes function again as normal. The BAS is then deactivated. G Observe Safety notes, see page 50. Braking At the instant one of the wheels is about to lock up, a slight pulsation can be felt in the brake pedal, indicating that the ABS is in the regulating mode. X Keep firm and steady pressure on the brake pedal while you feel the pulsation. Continuous, steady brake pedal pressure yields the advantages provided by the ABS, namely braking power and the ability to steer the vehicle. The pulsating brake pedal can be an indication of hazardous road conditions and G Warning! If the BAS malfunctions, the brake system still functions, but without the additional brake Z Safety and security X Keep continuous full pressure on the brake pedal.
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