Mercedes-Benz 1998 SL 500 Operator's Manual page 25

Air Recirculation
This mode can be selected to
temporarily reduce the entry of
annoying odors or dust into the
vehicle's interior.
Outside air is not supplied to the
car's interior.
To select, press button.
To cancel, press button again.
The system will automatically
switch from recirculated air to fresh
air
•
after approx. 5 minutes at
outside temperatures below
approx. 40°F (6°C),
•
after approx. 20 minutes, at
outside temperatures above
approx. 40°F (5°C),
•
after approx. 5 minutes, if button
is pressed.
If the windows should fog up from
the inside, switch from recirculated
air back to fresh air,
At high outside temperatures, the
system automatically engages the
recirculated air mode thereby
increasing the cooling capacity
performance, switching to partially
fresh air within 20 minutes.
Residual Engine Heat Utilization
With the engine switched off, it is
possible to continue heating the interior
for a short while.
Air volume and distribution are
controlled automatically.
To select:
Turn key in steering lock to position 1
or 0 or remove key. Close air outlet in
rear passenger compartment.
Press button.
This function selection will not activate
if the battery charge level is
insufficient.
To cancel: Press button.
The system will automatically
shut off
•
if you turn key in steering lock to
position 2,
•
after approx. 30 minutes,
•
if the battery voltage drops.
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.
Important!
This vehicle is equipped with an
air conditioner system that uses
R-134a (HFC: hydrofluorocarbon)
as a refrigerant. Repairs should
always be performed by a qualified
technician, and refrigerant should
be collected in a recovery system
for recycling.
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