Mercedes-Benz SL 500 Operator's Manual page 356

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.
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. Air hose 2 and union
nut 3 can become hot duration infla-
tion. Exercise proper caution to avoid
burning yourself when using the equip-
ment.
!
Do not operate the air pump longer
than eight minutes without interrup-
tion. Otherwise it may overheat.
You may operate the air pump again af-
ter it has cooled off.
Press 0 on the electric air pump switch.
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 tire pressure is above 36 psi
(2.5 bar), release excess tire pressure
using the vent screw.
Practical hints
Flat tire
Warning!
Follow recommend inflation pressures.
Do not overinflate tires. Overinflating tires
can result in sudden deflation (blowout) be-
cause they are more likely to become punc-
tured 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.
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