Aerpro Control Harness fits Mercedes

Steering Wheel control Primary harness adapters convert the commands from your car's steering wheel controls to a code that an aftermarket radio can recognize. A patch lead is also requires for SWC type systems based on the brand of head unit you have. for more details check out our you tube video. http://aerpro.com/video/control_harness_installation
CHMERC
ISO 10pin, use PL type patchlead
Mercedes C-Class (W203) ->2004
Mercedes CLK-Class (W208) ->05/2003
Mercedes CLK-Class (W209) ->03/2004
Mercedes E-Class (W210) ->2003
Mercedes SL-Class (R230) ->07/2004

models with interior CAN-Bus and these OEM head units (10-PIN Iso connector)

Audio 10
Audio 30 APS (D2B)

Wire Code for extra wires:
White Reverse
Yellow/Red trace Speed Signal

THIS CONTROL HARNESS REQUIRES A SPECIAL PATCH LEAD SOLD SEPARATELY. SEE BELOW:
ALPINE - PL101
CLARION - PL104
JVC - PL104
KENWOOD - PL105
PIONEER - PL107
SONY - PL107