I had a chance to install a Nakamichi CD400 inside sf280's car which is 2000 C280 with bose system last weekend.
What you need to do installation without cutting your wires/harness inside a car:
VW Audio harness
You could buy these in circuit city or best buy near you.
Once you get the harness, connect each wire correctly using the wiring diagram I posted here:
http://www.club202.com/forums/showth...=&postid=19298
The result:
For '98 and later bose system and '94-2000 NON bose system
For '94-'97 Bose system, you need a line converter. I used ven 4.5 in the past
After you are done with wiring, try to take out your OEM head unit with the
The tool:
It should just clip in like in the climate control and you can pull:
You need to unplug the wire, connect the harness and You also need a European antenna to universal adapters.
Once you are done, here is how it look:
Fitment
Evening:
At night: