2008 Mercedes SL-Class Owner's Manual - Page 424

Practical hints Flat tire Insert electrical plug 3 into vehicle cigarette lighter socket ( page 244) or the power outlet in the trunk ( page 246). Turn the SmartKey in the starter switch to position 1. or Press the KEYLESS-GO* start/stop button on the gear selector lever once without depressing the brake pedal. Press I on the electric air pump switch 2. The electric air pump should now switch on and inflate the tire. Inflate the spare tire: SL 550 to 36 psi (2.5 bar) SL 600, SL 55 AMG, SL 55 AMG (Performance Package*), and SL 65 AMG to 51 psi (3.5 bar) This takes about 5 minutes. Air hose 4 and union nut 5 can become hot during inflation. Exercise proper caution to avoid burning yourself when using the equipment. Press 0 on the electric air pump switch 2. Turn the SmartKey in the starter switch to position 0. or Press KEYLESS-GO* start/stop button on the gear selector lever twice without depressing the brake pedal. The electric air pump should now be switched off. If the spare tire inflation pressure is above the recommended tire inflation pressure for the respective collapsible tire ( page 453), release excess spare tire inflation pressure using the vent screw. ! 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. ! 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. 423