2000 Mercedes ML-Class Owner's Manual - Page 209

Instruments and controls Driving systems Operation Driving Instrument cluster display Practical hints Car care Technical data Index 206 When testing the parking brake on a brake test dynamometer, the engine must be shut off. Otherwise, the ESP will immediately be engaged and will apply the rear wheel brakes. In winter operation, the maximum effectiveness of the ESP is only achieved with Mercedes-Benz recommended M+S rated radial-ply tires and/ or snow chains. Synchronizing ESP If the power supply was interrupted (battery disconnected or empty), the BAS/ ESP malfunction indicator lamp may be illuminated with the engine running. After driving off the BAS /ESP malfunction indicator lamp should go out after approximately 110 - 220 yd (100 - 200 m). If the BAS /ESP malfunction indicator lamp ¿ comes on continuously with the engine running, a malfunction has been detected in either system. Only partial engine output will be available. If the BAS malfunctions, the brake system functions in the usual manner, but without BAS. If the BAS/ESP malfunction indicator lamp stays illuminated, have the BAS or ESP checked at your authorized Mercedes-Benz Light Truck Center as soon as possible. With the ABS malfunctioning, the ESP is also switched off. Driving the vehicle with varied size tires will cause the wheels to rotate at different speeds, therefore the ESP may activate (yellow ESP warning lamp v in speedometer dial comes on). For this reason, all wheels, including the spare wheel, must have the same tire outside diameter.