Mercedes-Benz CLS Operator's Manual page 362

Emergency spare wheel
360
X
Turn the SmartKey to position 0 in the
ignition lock.
X
If the tire pressure is higher than the
specified pressure, press pressure release
button ; until the correct tire pressure has
been reached.
X
Unscrew union nut : on the air hose from
the valve.
X
Screw the valve cap onto the collapsible
spare wheel valve again.
X
Stow plug ? and the air hose in the lower
section of the blower housing.
X
Stow the tire inflation compressor in the
vehicle.