Steering Wheel Electronics Control Unit, Basic Function - GF82.90-P-9890A

Model All (4xWD) 

Model All (CAR) 

Example illustration of steering wheel electronics 

Courtesy of MERCEDES-BENZ USA

Overview 

This document contains information on:

• General 
• Function requirements 
• Function 

General 

The steering wheel electronics (1) enable data exchange between the multifunction steering wheel button groups, the hand detection system control unit (vehicles with capacitive steering wheel) and the steering column tube module control unit.

The steering wheel electronics (1) are located in the multifunction steering wheel itself.

Function requirements 

• Circuit 30t

Function 

The steering wheel electronics (1) are connected to the network architecture of the vehicle.

The steering wheel electronics (1) receive the following information:

• Steering wheel heater temperature (vehicles with steering wheel heater)
• Operation requests through multifunction steering wheel
• Status of "Hands-off detection" from hand detection system control unit (vehicles with capacitive steering wheel)

The steering wheel electronics (1) assess this information and send, among other things, the following information and requests:

• Status of steering wheel heater (vehicles with steering wheel heater)
• Status of "Hands-off detection" (vehicles with capacitive steering wheel)
• Request:

• Steering wheel heater (vehicles with steering wheel heater)
• Circuit 58d (symbol lighting)
• Operation requests through multifunction steering wheel

	Component descriptions
	Steering wheel electronics control unit, component description	Model 223	GF82.90-P-4006A
		Model 243	GF82.90-P-4006B
		Model 297	GF82.90-P-4006D
		Model 295	GF82.90-P-4006E
		Model 232	GF82.90-P-4006F
		Model 296	GF82.90-P-4006G
		Model 254	GF82.90-P-4006H
		Model 464	GF82.90-P-4006J
		Model 214	GF82.90-P-4006K
		Model 118, 177, 247 as of model year 2023	GF82.90-P-4006L
		Model 167 as of model year 2023	GF82.90-P-4006M
		Model 294	GF82.90-P-4006N