2011 Mercedes R-Class Owner's Manual - Page 157

Automatic transmission Problem Vehicles with a gasoline engine: The engine is not running smoothly and is misfiring. Possible causes/consequences and M Solutions There is a malfunction in the engine electronics or a mechanical component of the engine management system. X Only depress the accelerator pedal slightly. X Have the cause rectified immediately at a qualified specialist workshop. Otherwise, non-combusted fuel may get into the catalytic converter and damage it. The coolant level is too low. The coolant is too hot and the engine is no longer being cooled sufficiently. X Stop as soon as possible and allow the engine and the coolant to cool down. X Check the coolant level (Y page 281). Observe the warning notes as you do so and add coolant if necessary. 155 The coolant temperature gauge shows a value above 248 ‡(120 †). Automatic transmission Important safety guidelines G Warning It is dangerous to shift the automatic transmission out of parking position P or neutral position N if the engine speed is higher than idle speed. If your foot is not firmly on the brake pedal, the vehicle could accelerate quickly forward or in reverse. You could lose control of the vehicle and hit someone or something. Only shift into gear when the engine is idling normally and when your right foot is firmly on the brake pedal. DIRECT SELECT lever Overview of transmission positions The DIRECT SELECT lever is on the right of the steering column. G Warning! Keep in mind that turning off the engine alone only will shift the automatic transmission into neutral position N automatically. Always shift the automatic transmission into park position P before turning off the engine. Otherwise the vehicle could roll away which could result in an accident and/or serious personal injury. P R N D Park position with parking lock Reverse Neutral Drive i The DIRECT SELECT lever always returns to its original position. The current transmission position P, R, N or D appears in the transmission position display (Y page 156) in the multifunction display. Z Driving and parking