2003 Mercedes SL-Class Owner's Manual - Page 316

Practical hints Flat tire Inflating the spare tire Turn the key in the ignition to position 1. or Press the KEYLESS-GO* start/stop button on the selector lever once without depressing the brake pedal. Press 1 on the electric air pump switch. 1 Flap 2 Air hose with pressure gauge and vent screw 3 Union nut 4 Electrical plug Open flap 1 on air pump. Pull out the electrical plug 4 and air hose with the pressure gauge 2. Remove the valve cap from the tire valve. Screw the air hose 2 onto the tire valve. Insert electrical plug 4 into vehicle cigar lighter socket. The electric air pump should now switch on and inflate the tire. Inflate the tire to approx. 36 psi (2.5 bar). This takes about five minutes for the spare tire. The air hose 2 and the union nut 3 can become hot duration inflation. Exercise proper caution to avoid burning yourself when using the equipment. ! Do not lower the vehicle before inflating the spare wheel tire. Otherwise the rim may be damaged. Take the electric air pump out of the trunk ( page 289). Warning! G Observe instructions on air pump label. 316