2010 Mercedes GL-Class Owner's Manual - Page 316

314 What to do if ... Display messages Possible causes/consequences and M Solutions The tire inflation pressure in at least one tire is significantly below the reference value. X Carefully bring the vehicle to a halt, avoiding abrupt steering and braking maneuvers. X Check and adjust tire inflation pressure as required. X If necessary, change the wheel (Y page 336). h Tire Pressure Check Tires G Warning! Practical hints Do not drive with a flat tire. A flat tire affects the ability to steer or brake the vehicle. You may lose control of the vehicle. Continued driving with a flat tire will cause excessive heat build-up and possibly a fire. G Warning! Follow recommended tire inflation pressures. Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect handling and fuel economy, and are more likely to fail from being overheated. Do not overinflate tires. Overinflated tires can adversely affect handling and ride comfort, wear unevenly, increase stopping distance, and result in sudden deflation (blowout) because they are more likely to become punctured or damaged by road debris, potholes etc. What to do if ... Lamps in instrument cluster Notes If any of the following lamps in the instrument cluster fails to come on during the bulb selfcheck when switching on the ignition, have the respective bulb checked and replaced if necessary. When you switch on the ignition, all lamps (except low-beam headlamp indicator lamp, high-beam headlamp indicator lamp, and turn signal indicator lamps unless activated) in the instrument cluster come on. If a lamp in the instrument cluster fails to come on when the ignition is switched on, have it checked and replaced if necessary.