Drive Unit Control Unit Component Description - GF27.60-P-5168FR
Transmission 725.0 in model 257.361, 290
up to model year 2021
View of model 257 from rear right
Location
The Drive Unit control unit is installed in the front right footwell.
Tasks
The drive unit control unit coordinates the transmission modes.
The following transmission modes can be selected:
- "E" (Economy) (only model 257.361)
- "C" (Comfort)
- "S" (Sport)
- "S+" (Sport+)
- "RACE" (RACE)
- "I *" (Individual)
Shown in Audio/COMAND display (A40/8):
The transmission modes, as well as the representation of the all-wheel visualization, are shown in the Audio/COMAND display.
On model 290, further tasks include the reception and forwarding of signals from the touchpad (A105), Audio/COMAND control panel (except code 446 (Touchpad only)), upper control panel control unit (N72/1), left lower control panel (N72/4) or right lower control panel (N72/5).
On vehicles with code B26 (AMG Aerodynamics Package) the Drive Unit control unit actuates the rear spoiler functions over the rear wing control unit (N170).
On vehicles with code 466 (Active engine mount) and/or code 467 (Electronic locking differential) the Drive Unit control unit also reads in the signals from various sensors over the CAN network, and uses them to calculate the specified status of the active engine mount and the locking ratio for the electronic differential lock.
Vehicles with code U88 (AMG steering wheel buttons (AMG DRIVE UNIT)) are equipped with a steering wheel control system. This means that the lower button group 1 for the multifunction steering wheel (S163/3) or the lower button group 2 for the multifunction steering wheel (S163/4) can be used, e.g. to make the following settings: ESP®, suspension, transmission, engine start/stop, exhaust gas flap actuation and drive program.
Coding
The Drive Unit control unit is codable and programmable, i.e., the complete software in the control unit can be updated.
CAN network
The drive unit control unit is a participant of the following CAN network and exchanges data with other control units:
- AMG CAN (CAN AMG)
- Drive train CAN (CAN C1)
- User interface CAN (CAN HMI)
- Drive Unit CAN (CAN DRVU)
Suspension FlexRay (Flex E)
The Drive Unit control unit is a user on the suspension FlexRay and it exchanges data with other control units.
LIN network
The Drive Unit control unit exchanges data over the following LIN connections with the connected components:
- Lower control panel LIN (LIN A3)
- Aerodynamics LIN (LIN E3)
Input and output signals
The following input signals are evaluated by the Drive Unit control unit and the corresponding output signals are issued:
- Direct input/output signals
- CAN input/output signals
- Chassis FlexRay
- LIN input/output signals
Direct input/output signals
Input factors and output factors for the following components are read in or output over direct lines by the Drive Unit control unit:
| Input factors over a direct line | Initial parameters over a direct line | Supplemental information |
|---|---|---|
| Circuit 30 | - | - |
| Circuit 31 | - | - |
CAN input/output signals
Input and output parameters for the following control units are sent or received by the Drive Unit control unit via CAN:
| Input factors over the AMG CAN (CAN AMG) | Output factors over the AMG CAN (CAN AMG) | Supplemental information |
|---|---|---|
| Electric differential lock control unit (N3/2) | Electric differential lock control unit (N3/2) | With code 467 (Electronic locking differential) |
| Active engine mounts control unit (N3/42) | Active engine mounts control unit (N3/42) | With code 466 (Active engine mount) |
| Input factors via drive train CAN (CAN C1) | Initial parameters via drive train CAN (CAN C1) | Supplemental information |
|---|---|---|
| ME-SFI [ME] control unit (N3/10) | - | - |
| Control unit for electric controller unit of fully integrated transmission control (Y3/8n4) | - | - |
| Diagnostic connector (X11/4) | Diagnostic connector (X11/4) | Over the diagnostic CAN (CAN D), electronic ignition lock control unit (N73) and the user interface CAN (CAN HMI) |
| Input parameters via user interface CAN (CAN HMI) | Output parameters via user interface CAN (CAN HMI) | Supplemental information |
|---|---|---|
| Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | - |
| Instrument cluster (A1) | - | - |
| Input factors over the Drive Unit CAN (CAN DRVU) | Output factors over the Drive Unit CAN (CAN DRVU) | Supplemental information |
|---|---|---|
| DIRECT SELECT INTERFACE (N150) | - | - |
| Left lower control panel (N72/4) | - | - |
| Right lower control panel (N72/5) | - | - |
| Input parameters via suspension FlexRay (Flex E) | Output parameters via suspension FlexRay (Flex E) | Supplemental information |
|---|---|---|
| All-wheel drive control unit (N45) | - | - |
| Electronic Stability Program control unit (N30/4) | Electronic Stability Program control unit (N30/4) | - |
| Steering column tube module control unit (N80) | - | On vehicles with code U88 (AMG Steering wheel buttons (AMG DRIVE UNIT)) |
| Input factors over the LCP-LIN (LIN A3) | Output factors over the LCP-LIN (LIN A3) | Supplemental information |
|---|---|---|
| Touchpad (A105) | Touchpad (A105) | - |
| Audio/COMAND control panel (A40/9) | Audio/COMAND control panel (A40/9) | Except code 446 (Touchpad only) |
| Upper control panel control unit (N72/1) | Upper control panel control unit (N72/1) | - |
| Input factors over the Aerodynamics LIN (LIN E3) | Output factors over the Aerodynamics LIN (LIN E3) | Supplemental information |
|---|---|---|
| Rear wing control unit (N170) | Rear wing control unit (N170) | with code B26 (AMG Aerodynamics Package) |
| Wiring diagram for drive unit control unit | PE54.21-P-2128-97XBA |