Steering wheel button control adapter for Mercedes ACV SWC 42XMC005-0

Steering Wheel Button Control Adapter for Mercedes ACV SWC 42XMC005-0

Preserve the original steering wheel radio control functions when replacing the factory radio with an aftermarket unit. Depending on vehicle equipment, available functions and the software of the newly installed radio, some functions may be limited or replaced by others. Compare the shown wiring connectors with the connectors in your vehicle and ensure they match both technically and visually. Check whether one of the listed OEM radios was originally installed. Before final installation, verify vehicle functionality, system settings and correct operation of the steering wheel control (SWC).

Intended for vehicles

• Mercedes C-class (S204) (09/2007 -> 01/2011)
• Mercedes C-class (W204) (03/2007 -> 01/2011)
• Mercedes E-class (S212) (07/2009 -> 01/2013)
• Mercedes E-class (W212) (03/2009 -> 01/2013)

CAN Bus information

Connectors and power:

• Connector: 40-pin Mercedes Quadlock.
• Connector: OEM SWC > 3.5 mm jack / loose wire.
• Connector: +12V constant (yellow) – terminal 30 (fused from battery).
• Blue wire: +12V antenna power (antenna remote).

Compatibility and limitations:

• Vehicles without an OEM amplifier system.

Signals and output load capacity:

• Red: +12V ignition power (terminal 15).
• Orange: +12V illumination (terminal 58).
• Purple/white: +12V reverse signal.
• Pink: speed signal (speed pulse).
• Green: parking brake ground signal (GND).
• Total max. load of outputs: 250 mA. For higher current use relays – 1 relay with coil resistance min. 75 Ω, 2 relays with coil resistances min. 150 Ω.

Important additional information

• Steering wheel control (SWC) via CAN Bus. In reimported vehicles or vehicles with different software, function incompatibilities may occur.
• To fully activate the adapter, it is necessary to order the connection cable for the specific radio brand.

General installation instructions

Checks before installation:

1. Check all control functions and vehicle settings with the original OEM head unit installed.
2. Disconnect the original radio (OEM HU) with the power off.
3. Check all interface connections to ensure they are correctly connected – with the power off.

Connection and wiring sequence:

1. Check the interface settings and hardware configuration – with the power off.
2. Check the configuration of the connection cable to the radio – with the power off.
3. Connect the cable to the radio according to the aftermarket device manual.
4. Connect the remaining wires according to the device manual.
5. Connect the entire installation to the vehicle – connect the main power supply last.
6. Perform the software configuration of the interface according to the product description or manual.
7. Configure the aftermarket head unit (steering wheel control, camera, handsfree, antenna power and others).
8. Perform a functional test of the steering wheel control and communication with the vehicle.

Changing interface configuration and HU cable:

• Make all changes with the power off.
• After changes, repeat steps 5 to 8 listed above.

In case of interface or vehicle system malfunction:

• Reinstall the original OEM head unit.
• Start the original unit.
• Trigger CAN Bus system shutdown.
• Check the hardware configuration of the interface.
• After CAN Bus shutdown, repeat steps 5 and 6 listed above.

When modifying wiring or cable routing:

• Wiring and modifications may only be performed by professionally trained personnel.
• All changes must be verified for manufacturer approval or for impact on the vehicle warranty before connection.
• All modifications must be verified by measurement and compared with the vehicle wiring diagram before connection.
• Modifications are carried out at your own risk, without guarantee of functionality.
• Modifications are performed at your own risk, without guarantee against damage to the vehicle, device or interface.
• Pre-modified cabling may lead to loss of product warranty.

Product comments

Evaluation

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• Mounting material and ACV reduction