2011 Mercedes SL-Class Owner's Manual - Page 249

Vehicle status messages in the multifunction display Display messages Possible causes/consequences and M Solutions The battery is no longer charging. Possible causes: Ralternator Rbroken Ra 247 # malfunctioning poly-V-belt malfunction in the electronic system Do not forget that the brake system requires electrical energy and may be operating with restricted capability. Considerably greater brake pedal force is required and the stopping distance is increased. X Stop immediately in a safe location or as soon as it is safe to do so and check the poly-V-belt. X If it is broken: Do not continue to drive. Otherwise the engine will overheat due to an inoperative water pump which may result in damage to the engine. Contact an authorized Mercedes-Benz Center. X If it is intact: Drive to the nearest authorized MercedesBenz Center immediately. Adjust driving to be consistent with reduced braking responsiveness. # The battery is defective. Battery/ Alternator The electro-hydraulic brake system requires electrical energy Stop Car and therefore has only limited operation. Considerably greater brake pedal force is required and the stopping distance is increased. X Stop the vehicle in a safe location or as soon as it is safe to do so. X Adjust driving to be consistent with reduced braking responsiveness. X Contact an authorized Mercedes-Benz Center. Engine Oil Level Check Level Vehicles with oil dipstick only: The engine oil has dropped to a critical level. X Check the engine oil level (Y page 181) and add engine oil as required (Y page 183). X If you must add engine oil frequently, have the engine checked for possible leaks. 4 Z Practical hints