Steering Wheel - Mercedes-Benz S-Class Series 2021 Operator's Manual

Switch the function for the desired seats on
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or off.
Switching the seat ventilation on/off
Requirements:
The power supply is switched on.
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Press button 1 repeatedly until the desired
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blower setting has been reached.
Depending on the blower setting, up to three
indicator lamps will light up. If all indicator
lamps are off, the seat ventilation is switched
off.
% If you switch the power supply off and on
again within 20 minutes, the previous seat
Seats and stowing 125
ventilation setting for the driver's seat will
remain active.

Steering wheel

Adjusting the steering wheel electrically
& WARNING Risk of accident due to
adjusting the vehicle settings while the
vehicle is in motion
You could lose control of the vehicle in the
following situations in particular:
If you adjust the driver's seat, the head
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restraint, the steering wheel or the mirror
while the vehicle is in motion
If you fasten your seat belt while the vehi‐
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cle is in motion
Before starting the engine: In particular,
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adjust the driver's seat, head restraint,
steering wheel and mirror, and fasten
your seat belt.