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Crux SWRMB-57M Wiring Interface

Connect a new car stereo and retain the steering wheel audio controls in select 2003-08 Mercedes-Benz vehicles

Item # 249MB57M

Crux's SWRMB-57M interface ensures that you can keep the factory steering wheel controls in your Mercedes-Benz when...

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Crux's SWRMB-57M interface ensures that you can keep the factory steering wheel controls in your Mercedes-Benz when...

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Item # 249MB57M

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About the Crux SWRMB-57M Wiring Interface

Keep those factory options

Crux's SWRMB-57M interface ensures that you can keep the factory steering wheel controls in your Mercedes-Benz when installing a compatible aftermarket radio. Connect this interface to the wires on your new stereo's wiring harness, and you've covered the power, ground, and factory speaker connections for your new stereo. The interface also provides the reverse gear, illumination, and speed sense outputs you'll need to install a navigation receiver. This interface does not retain Bluetooth® or Sirius satellite radio, and it will not work with Mercedes-Benz amplified systems.

Keep those factory options

Crux's SWRMB-57M interface ensures that you can keep the factory steering wheel controls in your Mercedes-Benz when installing a compatible aftermarket radio. Connect this interface to the wires on your new stereo's wiring harness, and you've covered the power, ground, and factory speaker connections for your new stereo. The interface also provides the reverse gear, illumination, and speed sense outputs you'll need to install a navigation receiver. This interface does not retain Bluetooth® or Sirius satellite radio, and it will not work with Mercedes-Benz amplified systems.

Note: the SWRMB-57M interface allows you to keep your steering wheel controls with radios from Alpine, Blaupunkt, Clarion, JVC, Kenwood, Pioneer, and Sony.

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Product highlights:

  • connect a new stereo in select 2003-08 Mercedes-Benz models
  • retain your steering wheel controls with select car stereos
  • provides Vehicle Speed Sensor (V.S.S.), reverse gear, and illumination connections for installing navigation receivers
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # SWRMB-57M

What's in the box:

  • Radio replacement interface module
  • Quadlock harness
  • 2 SWC harnesses
  • Installation Instructions

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More details on the Crux SWRMB-57M Wiring Interface

Stacey B.

Product Research

Features

Mercedes-Benz Radio Replacement Interface: The CRUX SWRMB-57M is a radio replacement interface for select Mercedes-Benz vehicles. It facilitates the integration of an aftermarket radio and enables retention of factory features when replacing a factory installed radio. This interface is also pre-programmed for retention of steering wheel controls.

Vehicle Compatibility: The CRUX SWRMB-57M is compatible with the following Mercedes-Benz vehicles without a factory amplifier (not compatible with factory amplified systems).

Make Model Year
Mercedes-Benz E-class (W211) 2004-2008
CLS-class (W219) 2005-2006
SLK Class (R171) 2005-2008
Note: This interface does not retain the factory Bluetooth or Sirius Satellite Radio.

Steering Wheel Control Retention: The CRUX SWRMB-57M also features a steering wheel control output for Pioneer, Sony, Alpine, Clarion, Kenwood, JVC, and Blaupunkt aftermarket head units. The steering wheel control output consists of a right-angle 3.5mm connector and a light blue/yellow wire (use the connection that your aftermarket head unit is fitted with). The SWRBM-57 interface module will work with any of the listed aftermarket head units, by setting its three dip-switches (see owner's manual for appropriate setting).

Note: There are two steering wheel control harnesses provided. One is labeled for Alpine, Clarion, Kenwood, and JVC. The other is labeled for Pioneer & Sony. You will only use one of these harnesses based on your type of radio.

Navigation Outputs: The CRUX SWRMB-57M radio replacement interface module provides a VSS (vehicle speed sense) and a Reverse Gear output to make installing an aftermarket Navigation radio simpler and less time consuming.

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