Function Of Seat Heating: Notes

The heating mats for the driver's seat and passenger's seat are controlled separately. The heating stage is selected with the seat heating switches in the center console switch cluster. The seat heating is operational as from terminal 15 ON. The heating stage is selected by pressing the seat heating switch several times. 3 green light emitting diodes (LEDs) above the seat heating switches indicate the status of the seat heating system.

Operate the seat heating systems as described in the Owner's Handbook.

NOTE: The seat heating is interrupted when steering column adjustment is activated.

The seat heating is interrupted in order to protect the SZM. The current at the SZM would be too high if the seat heating and steering column adjustment were operated simultaneously, posing a risk of irreparable damage to the electronic circuitry.

The seat heating system features the following functions:

Seat heating ON and OFF
Seat heating temperature control
Monitoring of temperature sensor
Seat heating output management
Overvoltage/undervoltage detection
Short-circuit detection
No-load detection
Plausibility check of temperature profile