2009 Mercedes SL-Class Owner's Manual - Page 325

Practical hints Flat tire X X X X Remove the valve cap from the collapsible tire valve. Screw union nut 5 onto the collapsible tire valve. Make sure air pump switch 2 is set to 0. Insert electrical plug 3 into the cigarette lighter socket (Y page 186) or a power outlet (Y page 187). Turn the SmartKey in the starter switch to position 1. Vehicles with KEYLESS-GO: Press the KEYLESS-GO start/stop button on the gear selector lever once. Do not depress the brake pedal. Press I on electric air pump switch 2. The electric air pump switches on and inflates the collapsible tire. Inflate the collapsible tire to the recommended tire inflation pressure as specified for your vehicle (Y page 346). This should take approximately 5 minutes. tion to avoid burning yourself when using the equipment. X ! Do not operate the electric air pump longer than 8 minutes without interruption. Otherwise it may overheat. You may operate the air pump again after it has cooled off. ! 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. X X Version 1 only: If the tire inflation pressure is above the recommended tire inflation pressure as specified for your vehicle (Y page 346), decrease tire pressure using the vent screw on air hose 4. Version 2 only: If the tire inflation pressure is above the recommended tire inflation pressure as specified for your vehicle (Y page 346), decrease tire pressure using deflate button 6. X X or X X 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 on the gear selector lever twice. Do not depress the brake pedal. X G Warning! Follow recommend 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. X X X or X Detach the electric air pump. Reinstall collapsible tire valve cap. Version 1 only: Store electrical plug 3 and air hose 4 behind flap 1 and place Z G Warning! The air hose and the union nut can become hot during inflation. Exercise proper cau- 323