2008 Mercedes R-Class Owner's Manual - Page 501

Practical hints Flat tire Inflate the spare wheel tire to the recommended tire inflation pressure given in the "Technical data" section ( page 529). This takes about 5 minutes for the collapsible tire. Warning! ! Please compare the recommended tire inflation pressure for your vehicle with the tire inflation pressure on the yellow label located on the spare wheel rim. If the tire inflation pressure on the yellow label on the spare wheel rim differs from the values given in this Operator's Manual, inflate the tire to the recommended tire inflation pressure given on the yellow label on the spare wheel rim. Warning! G Follow recommend tire inflation pressures. Do not overinflate tires. Overinflating tires can result in sudden deflation (blowout) because they are more likely to become punctured or damaged by road debris, potholes, etc. Do not underinflate tires. Underinflated tires wear unevenly, adversely affect handling and fuel economy, and are more likely to fail from being overheated. G Press 0 on electric air pump switch 2. Turn the SmartKey in the starter switch to position 0. Vehicles with KEYLESS-GO*: Press the KEYLESS-GO start/stop button twice without depressing the brake pedal. If the tire inflation pressure is above the recommended tire inflation pressure given in this Operator's Manual, release excess tire inflation pressure using the vent screw. Air hose 4 and union nut 5 can become hot during inflation. Exercise proper caution to avoid burning yourself when using the equipment. ! Do not operate the electric air pump longer than 8 minutes without interruption. Otherwise it may overheat. You may operate the electric air pump again after it has cooled off. Detach the electric air pump. Store the electrical plug and the air hose behind the flap and place the electric air pump back in the vehicle tool kit storage well. 500