Lower Multifunction Steering Wheel Button Group Electric Controller Unit, Component Description - GF82.90-P-4007RFM
Model 205 as of model year 2019 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))
Model 253 as of model year 2020 with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT))
Shown on left-hand drive vehicle
Location
The electric controller unit for the lower multifunction steering wheel button group is attached to the lower steering column.
Tasks
The electric controller unit for the lower multifunction steering wheel button group is used for communication between the lower multifunction steering wheel button group 1 (S163/3) or the lower multifunction steering wheel button group 2 (S163/4) and the drive program control unit (N145). The electric controller unit for the lower multifunction steering wheel button group is responsible for the following individual tasks:
- CAN interface:
- Receiving control data for the lower multifunction steering wheel button group from the drive program control unit over the steering column tube module control unit (N80) and the steering wheel CAN (CAN LR)
- Forwarding of operation signals of lower multifunction steering wheel button group over the steering wheel CAN and the steering column tube module control unit to the drive program control unit
- Direct line (serial peripheral interface):
- Reception of operation signals from lower multifunction steering wheel button groups
- Actuation of displays in lower multifunction steering wheel button groups
The lower multifunction steering wheel button groups can be used, e.g. to make settings in the following areas: ESP®, suspension, transmission, engine start/stop, exhaust gas flap actuation and drive program.