Mercedes-Benz S-Class Owner's Manual page 127

* NOTE Damage to the seats caused by
objects or documents when the seat
heater is switched on
When the seat heater is switched on, over‐
heating can occur due to objects or docu‐
ments placed on the seats e.g. seat cushions
or child seats. This could cause damage to
the seat surface.
Make sure that no objects or docu‐
#
ments are on the seats when the seat
heater is switched on.
Requirements:
the power supply is switched on
R
Seats and stowing 125
To switch on/increase the level: press but‐
#
ton 1 repeatedly until the desired heating
level is set.
Depending on the heating level, up to three
indicator lamps will light up.