Steering Wheel Heater, Basic Function - GF46.11-P-9900A

Model All (CAR) with code 443 (Heated steering wheel) 

Overview 

This document contains information on

• General
• Function requirement
• Function

General 

The steering wheel heater increases the temperature on the steering wheel rim thereby improving driver comfort, in particular, at low outside temperatures.

Function requirement 

• Interior temperature below approx. 30 °C

Function 

The steering wheel heater is controlled by the steering wheel electronics. Heat is provided by a heating element in the steering wheel rim. A temperature sensor in the heating element records the surface temperature of the steering wheel rim. The steering wheel electronics read in the signals from the temperature sensor and regulate the surface temperature of the steering wheel rim to approx. 35 °C.

Depending on the model series, the steering wheel heater is operated by a switch on the steering column tube or via the MEDIA display. If the steering wheel heater is switched on, an LED lights up in the steering wheel heater switch.

Fig 1: Steering Wheel Heater Components Location - Model All (Car) With Code 443

Courtesy of MERCEDES-BENZ USA