CAN BUS Radio harness / ISO adaptor lead

For Mercedes-Benz cars and vans that do not have an ignition power supply in the factory harness and use a quad-lock connection on the back of the original radio. This cable is used to connect an after market radio to the original wiring harness, plug and play. This harness includes the additional connection for the power for the amplified antenna which fits in the slot in the bottom of the quad-lock.

This cable is for cars and vans originally equipped with the Audio or Sound 20 audio system. This will not work on vehicles with the other systems as they have a different wiring harness connection.

This cable includes the power and speaker supply and provides an ignition supply from the cars CAN bus data system when the key is in the accessory position and will only turn off when the key is removed from the ignition. This adapter will not retain steering wheel radio or phone control functions.

If in doubt, the easiest way to check if you car is fitted with a CAN bus system rather than an ignition power supply is to check if the radio only turns off when the key is removed from the ignition, rather than when the key is turned back to position 0. If it turns off only once removed the you have a CAN bus car which will need this adapter for a new after market radio.

This will fit many Mercedes-Benz cars and vans fitted with the Audio 20 original radio: