Mercedes-Benz SL Operator's Manual page 101

Dust filter
Nearly all dust particles and pollen are filtered out
before outside air enters the passenger compartment
through the air distribution system.
Notes:
Do not obstruct the air flow by placing objects on the air
flow through exhaust slots below the rear window.
Also keep the air intake grille in front of windshield free
of snow and debris.
Automatic climate control
Instruments
Operation
and controls
Instrument
Driving
cluster display
97
Practical hints Car care
Technical
Index
data