Seat Heating

Seat Heating

Seat heating is offered in the R56 as an optional extra. The seat heating is operated electrically. Seat heating serves to set up a pleasant temperature in the seats.

Brief description of components

The following components are described for the seat heating:
- Switch panel
- Integrated automatic heating/air-conditioning system (IHKA)
Integrated heating/air-conditioning system (IHKS)
Integrated heating control (IHS)
- Junction box electronics (JBE)
- Heating element

Switch panel
The seat heating is activated using the outer buttons of the bank of switches. The seat heating can be operated on three temperature levels. An indicator light lights up in the button for each selected temperature setting. The button signals are evaluated by the IHKA.

Integrated automatic heating and air conditioning system (IHKA)
A choice of the heating systems mentioned above can be fitted in the vehicle. This document refers to the equipment fitted integrated automatic heating and air conditioning system (IHKA). The IHKA processes the button signals from the bank of switches. The IHKA sends a message via the K-CAN to the junction box electronics (JBE).

Junction box electronics (JBE)
The JBE handles the electrical power supply for the seat modules. Depending on the selected temperature setting, the JBE generates a pulse-modulated signal that activates the heating elements.

Heating element
The seat heating consists of a number of heating elements. The heating element consists of flexible electrical wires. The heating elements are integrated into the seat and backrest cover of the driver's and front passenger's seat. The heating element runs through the entire cover of the seat cushion and the backrest.







System functions

The following system functions are described for the seat heating:
- Heat up seat heating
- Monitor seat heating
- Cool down or switch off seat heating

Heat up seat heating
Pressing the relevant button in the bank of switches activates the corresponding seat heating. Pressing the button again changes the heat output of the seat heating. The set temperature setting is indicated by the indicator lamps in each button.

Monitor seat heating
The seat heating is monitored by a temperature sensor (NTC hot conductor). The temperature sensor is located in the heating element of the seat heating. The temperature sensor monitors the temperature and protects against overheating.

Cool down or switch off seat heating
The seat heating is switched off by pressing the relevant button until no indicator light is lit up. The seat heating can also be switched off by pressing the relevant button for a longer period.

No liability can be accepted for printing or other faults. Subject to changes of a technical nature.