SWRMB-57MRadio Replacement with Steering Wheel Control Retention for

Select Mercedes Benz Vehicles

Crux Interfacing Solutions • 21541 Nordhoff St., Unit C, Chatsworth, CA 91311phone: (818) 609-9299 • fax: (818) 996-8188 • www.cruxinterfacing.com

RADIO REPLACEMENTSWC RETENTION

+R

INTERFACING SOLUTIONS

PRODUCT FEATURES:

- Retains factory features in select Mercedes Benz vehicles while functioning with an aftermarket radio.- Retains factory Steering Wheel Control functions.

1. This interface does not retain the factory Bluetooth or Sirius Satellite Radio.2. Not compatible with amplified systems.

PARTS INCLUDED:

SWRMB-57M Module SWRMB-57M Harness SWC Cables

rev.0204201 of 2

NOTES:

INSTALLATION DIAGRAM:

AFTERMARKETRADIO

+12V Constant Yellow+12V ACC Red

Ground BlackIllumina�on (+) Orange

Vehicle Speed Sense Purple/WhiteReverse Gear Signal Red/White

Right Front (+) GrayRight Front (-) Gray/BlackLe� Front (+) WhiteLe� Front (-) White/Black

Right Rear (+) PurpleRight Rear (-) Purple/BlackLe� Rear (+) GreenLe� Rear (-) Green/Black

TO FACTORYHARNESS

12-PinConnector

1 2 3

ON

4-PinConnector

3.5MM SWC CABLES (Option A or B)Use the proper 3.5MM to 4-Pin cable for your radio.Plug in the selected 3.5MM SWC cable to the 4-pin

port on the module. See “DIP SWITCH SETTINGS” section.

mini USBNot Used

CRUX

Option A:

Option B:

Cap or insulate ifnot being used

BLUE / YELLOW FOR JVC & KENWOOD

Insulate withtape if notbeing used

Crux Interfacing Solutions • 21541 Nordhoff St., Unit C, Chatsworth, CA 91311phone: (818) 609-9299 • fax: (818) 996-8188 • www.cruxinterfacing.com

RADIO REPLACEMENTSWC RETENTION

+R

INTERFACING SOLUTIONS

rev.020420

SWRMB-57MRadio Replacement with Steering Wheel Control Retention for

Select Mercedes Benz Vehicles

SETTING THE AFTERMARKET RADIO BRAND

This step is done on the SWRMB-57M Module. With the key in the off position, set the DIP switches to the corresponding radio listed below.

2 of 2

MERCEDES BENZ

2004 – 2008 E-class (W211) 2005 – 2006 CLS-class (W219)2005 – 2008 SLK Class (R171)

VEHICLE APPLICATIONS:

RADIO BRAND: DIP#: 1 2 3

Atoto, Dual, Fahrenheit, JensenPioneer, Power Acoustik, SoundstreamBlaupunkt, Most o�-brand RadioAlpineClarionKenwoodJVCBoss, Old SonyNew Sony

OFF ON ONOFF ON ONOFF ON ONOFF OFF OFFON ON OFFON ON ONON OFF ONON OFF OFFOFF ON OFF

SWC MODULEDIP SWITCH

1 2 3

ON

NOTE: For Atoto, Blaupunkt, Dual, Farenheit, Power Acoustik, Soundstream, and most o�-brand radios, check the aftermarket radio’s manual to see if the SWC buttons need to be programmed.

4-PIN SWC CABLE

Use the proper 3.5MM to 4-Pin SWC cable for the aftermarket radio you are using.

OPTION A is used for ALPINE, CLARION, JVC, and KENWOOD units (Blue/Yellow wire is attached)OPTION B is used for ATOTO, BLAUPUNKT, BOSS, DUAL, FARENHEIT, JENSEN, POWER ACOUSTIK,

PIONEER, SONY, SOUNDSTREAM and Most Off-Brand Radios.

NOTE: Cap or insulate the 3.5mm plug or Blue/Yellow wire if not being used.

RED to SWC Key 1WHITE to SWC Key 2SHIELD to SWC Ground

For aftermarket radios that have wires for SWC connections, cut off the 3.5mm plug on the Crux SWC Cable and connect the SWC wires as follows:

Note that there are some radios that only have SWC1 and SWC2, in this case “shield” does not need to be connected.