alnmike:
It's hard to say if your specific car has the (drivers seat, viewed from front) external VW amp model 1K6-035-456-A.
The VW 1K6 model is the amp in my MY06 Jetta TDI Pkg2 w/MFD2 DVD Navi and DSS (digital sound system) option as built in August 2006.
It was an easy plug n play swap with the new Dynaudio amp model # 3C0-035-456-C amplifier. Simply unplug the amp then rotate the two multi pin connectors 180 degrees, then connect the Dynaudio 3C0 amp. BINGO.... real HiFi in the Jetta. Made all the difference in the World.
Audio speaking:
Greater sound pressure level (SPL), Real stereo image, linear bandwith with detail, low distortion, very dynamic sound staging,,, something my optional, extra cost, ordered new VW DSS HiFi didn't have. The new Dynaudio amp alone makes the Jetta TDI stereo a pleasure to listen to. Can't wait for step 2 and source the Dynaudio drivers. Then again, why bother its now that improved. - In my case I've already started casting round for the Dyn drivers.
Do remember this optional HiFi stereo system is active, not passive. Big, huge difference!
Run don't walk if your Jetta TDI with external amp is a suitable candidate...