Steering wheel button control adapter for Mercedes ACV SWC 42XMC004-0

Steering wheel button control adapter for Mercedes ACV SWC

Retain the original steering wheel radio control functions when replacing the factory radio with an aftermarket unit. Depending on the vehicle equipment, the range of 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 make sure they match both technically and visually. Check whether one of the listed OEM head units was originally installed. Before final installation, verify vehicle functions, system settings and correct operation of the steering wheel control (SWC).

Intended for vehicles

• Mercedes CLS-class (W219) (10/2004 -> 06/2008)
• Mercedes E-class (S211/W211) (03/2002 -> 02/2008) electric trunk function not supported
• Mercedes SLK-class (R171) (03/2004 -> 03/2008)

CAN Bus information

Connectors and power:

• Connector: 40-pin Quadlock MB2 Mercedes.
• Connector: OEM SWC > 3.5 mm jack / loose wire.

Compatibility and limitations:

• Vehicles with 2-DIN Audio 20 OEM head unit.
• Vehicles without 2-DIN Audio 50 APS Comand NTG2 / NTG2.5 OEM navigation.
• Vehicles without Audio Gateway.
• Vehicles without OEM Harman Kardon amplifier system.
• Vehicles with Audio Gateway – use extension cable Audio Gateway > ISO (various lengths available).
• SWC Mercedes various models ISO / 10-pin ISO / Mini ISO connectors.
• Vehicles with Harman Kardon OEM system and Audio 20 OEM head unit require an active system adapter Audio Gateway MOST > RCA.
• Vehicles with Audio 50 APS Comand NTG2 / NTG2.5 OEM navigation using Harman Kardon multi-lead amplifiers: time setting is not supported – re-coding to Audio 20 OEM head unit is recommended where possible.

Signals and output load capacity:

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

Important additional information

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

General installation instructions

Checks before installation:

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

Connection and wiring order:

1. Check the interface settings and hardware configuration – with power off.
2. Check the configuration of the connection cable to the radio – with power off.
3. Connect the cable to the radio according to the aftermarket device instructions.
4. Connect the other wires according to the device instructions.
5. Connect the entire installation to the vehicle – connect the main power 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 other settings).
8. Perform a functional test of the steering wheel control and communication with the vehicle.

Changing interface configuration and head unit cable:

• Make all changes with power off.
• After any change 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.
• Invoke CAN Bus system shutdown.
• Check the hardware configuration of the interface.
• After shutting down the CAN Bus 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 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 made at your own risk, without guarantee of functionality.
• Modifications are at your own risk, without guarantee against damage to the vehicle, device or interface.
• Pre-modified harnesses may result in loss of product warranty.

Product comments

Evaluation

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