Radio Replacement Interface:
The CRUX SWRBM-57 is a radio replacement interface for select BMW and Mercedes vehicles. It facilitates the integration of an aftermarket radio to enable
retention of factory features when replacing a factory installed radio. This interface is also pre-programmed for retention of
steering wheel controls.
Compatibility: The CRUX SWRBM-57 is supported by the
following BMW and Mercedes vehicles; with non-amplified or amplified factory
audio systems including Bose (except Bose with fiber-optic amplifiers). Not
compatible with vehicle's featuring fiber-optic digital amplifiers.
|Mercedes||A-Class (W169) || Audio
B-Class (W245)||Audio 5||
Note: Two vehicle harnesses (Quadlock or ISO) are included
with the interface; you will only use one of these harnesses based on your
type of vehicle.
Steering Wheel Control Retention: The CRUX SWRBM-57 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: The steering wheel control harness features two 4-pin
connectors (labeled - Pioneer/Sony and Alpine/Clarion/Kenwood/JVC). You will
only plug in one of these connectors to the interface module, based on the
type aftermarket head unit you are installing.
Navigation Outputs: The CRUX SWRBM-57
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.
Amp Turn-On: The CRUX SWRBM-57 provides an amplifier turn-on
lead for your vehicle's factory analog amplifiers (if equipped). This adapter is
not compatible with vehicles that feature fiber-optic, digital amplifiers.
Wiring Harness: The SWRBM-57 includes two wiring harnesses;
there is a 2-connector factory harness (16-/10-pin) and a 1-connector (44-pin)
factory harness. Only one will be used based on the type of factory plug behind
your radio. Each harness also features a 12-pin connector that plugs into the
SWRBM-57 interface module. The wiring harness also provides bare-wire leads
(power/ground, speaker, illumination, turn-on, and navigation) which will need
to be hardwired to your aftermarket head unit's wiring harness.
|Red||+12 Volt Accessory|
|Yellow||+12 Volt Constant|
|White||Left Front Speaker +|
|White/black||Left Front Speaker -|
|Gray||Right Front Speaker +|
|Gray/black||Right Front Speaker -|
|Green||Left Rear Speaker +|
|Green/black||Left Rear Speaker -|
|Purple||Right Rear Speaker +|
|Purple/black||Right Rear Speaker - |
|Purple/white||VSS (vehicle speed sensor)|
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