2010 Mercedes GL-Class Owner's Manual - Page 309
2010 Mercedes GL-Class Manual
Page 309 highlights
Vehicle status messages in the multifunction display ! The engine should not be operated with the coolant temperature above 248‡ (120†). Doing so may cause serious damage which is not covered by the Mercedes-Benz Limited Warranty. Display messages Possible causes/consequences and M Solutions The poly-V-belt could be broken. X Stop the vehicle immediately as soon as it is safe to do so. X Turn off the engine immediately. X 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: Do not continue to drive the vehicle with this message displayed. Doing so could result in serious engine damage that is not covered by the Mercedes-Benz Limited Warranty. X Observe the coolant temperature in the multifunction display. X Drive to the nearest authorized Mercedes-Benz Center immediately. The radiator cooling fan is malfunctioning. X Observe the coolant temperature in the multifunction display. If the coolant temperature is below 248‡ (120†), you may continue driving to an authorized Mercedes-Benz Center. X Avoid placing heavy loads on the engine (e.g. by driving uphill) as well as stop-and-go traffic. X Have the fan replaced as soon as possible. 307 ? Coolant Stop car, switch engine off. ? Z Practical hints