Steering Wheel Electronics Control Unit, Component Description - GF82.90-P-4006FG

Model 213 

as of model year 2019 up to model year 2021 

Shown with steering wheel removed 

Location 

The steering wheel electronics are located in the multifunction steering wheel (MFL).

Tasks 

The steering wheel electronics do the following:

• Reading in of sensors and signals 
• Evaluation of input factors 
• Actuation of components 

Reading in of sensors and signals 

The input factors are read in via the following connections:

• Direct line 
• Steering wheel CAN (CAN LR) 

Direct line 

The signals from the following components are read via a direct line:

• Heating element temperature sensor (R22/4b1) (with CODE 443 (Steering wheel heater))
• Instrument cluster multifunction steering wheel button group (S163/1)
• Head unit multifunction steering wheel button group (S163/2)
• Steering wheel downshift button (S110/1) (transmission 725)
• Steering wheel upshift button (S111/1) (transmission 725)
• Horn contact plate (S4/2)

Steering wheel CAN 

The steering wheel electronics receive the signals for actuation of the following component parts over the steering wheel CAN from the steering column tube module control unit (N80):

• Multifunction steering wheel button groups (symbol illumination)
• Steering wheel heater heating element (R22/4r1) (with CODE 443 (Steering wheel heater))

Evaluation of input factors 

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Actuation of components 

The following components are actuated via a direct line:

• Multifunction steering wheel button groups (symbol illumination)
• Heating element for steering wheel heater (with code 443 (Steering wheel heater))