2007 Mercedes C-Class Owner's Manual - Page 292

Operation Tires and wheels Checking tire inflation pressure manually Follow the steps below to achieve correct tire inflation pressure: Remove the cap from the valve on one tire. Firmly press a tire gauge onto the valve. Read tire inflation pressure on tire gauge and check against the recommended tire inflation pressure on the placard on the driver's door B-pillar ( page 289). If necessary, add air to achieve the recommended tire inflation pressure. Run Flat Indicator* U.S. vehicles: The Run Flat Indicator is only available in conjunction with the MOExtended* system ( page 294). While the vehicle is being driven, the Run Flat Indicator monitors the set tire inflation pressures by evaluating each wheel's rotational speed. This allows the system to detect a significant loss of pressure in a tire. If a wheel's rotational speed changes due to falling tire inflation pressure, you will see a corresponding warning message in the multifunction display. Warning! G Follow recommended 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. Do not overload the tires by exceeding the specified load limit as indicated on the placard on the driver's door B-pillar. Overloading the tires can overheat them, possibly causing a blowout. i If you have overfilled the tire, release tire inflation pressure by pushing the metal stem of the valve with e.g. a tip of a pen. Then recheck the tire inflation pressure with the tire gauge. Install the valve cap. Repeat this procedure for each tire. 291