Mercedes-Benz S350 TURBODIESEL Operator's Manual page 23

6 Residual Engine Heat
Utilization
With the engine switched off, it is
possible to continue heating the interior
for a short while. The rear passenger
compartment air outlet must be closed.
Air volume and distribution are
controlled automatically.
To select:
Turn key in steering lock to position 1
or 0 or remove key.
Press button (indicator lamp
lights up). This function selection will
not activate if the engine coolant
temperature is below 122°F (50°C) or
if the battery charge level is insufficient.
To cancel:
• Press button
(indicator lamp goes out).
• Turn key in steering lock to
position 2.
The system will automatically
shut off
• after approx. 30 minutes,
• if the engine coolant temperature
drops below 122°F (50°C),
• if the battery voltage drops.
7 Air Recirculation
Outside air is not supplied to the car's
interior.
This mode can be selected to prevent
annoying odors or dust from entering
the car's interior.
To select:
Press button
(indicator lamp lights up).
To cancel:
Press button
(indicator lamp goes out).
The system will automatically switch
from recirculated air to fresh air if
button is pressed
• after approx. 5 minutes at
outside temperatures below
approx. 40°F(5°C),
• after approx. 20 minutes, at
outside temperatures above
approx. 40°F (5°C),
If button is pressed after approx.
5 minutes.
Notes:
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.
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