I did it to my Mk2. Even drilled a hole inside the glove compartment to mount it. It works pretty well, tho' I don't use it much. I'd suggest trying to get shielded cabling for it. I had to reroute mine several times to get rid of interference from my electronic fuel injection dealy. And you'll have to solder a resistor in there to convert from 2 RCAs to 1 phone plug, assuming you don't buy some sort of pre-built converter cable.