The cable set is required for all Mercedes vehicles of the W211, E-Class, BJ. 2002-2009 series, where the electronic unit (including amplifier) is located in the trunk
This means that the amplifier can be bypassed and the car radio speaker outputs can be adapted directly to the connector that was on the vehicle's power amplifier.
Adapter cable length: 5.50 meters
Optionally, the Can Bus interface 66030, the cable set 66146 and a specific adapter cable for 6640x series radio can be used to connect the steering wheel remote control