Passat B5 Diesel Gamma radio.

Bought a Dension GW100. Dreadful whistling going up through the rev range. Dreadful e-mail only service through IPODCARKIT DIRECT - after several weeks frustrating "dialogue" and a refusal to deal by phone, and (wrong) advice to re-route earths, they finally accepted it needed replacing.

The replacement was not whistling, but I had issues with mode and track selection, so returned it for a GW Lite which has reduced function but should be easier to work. Oh dear, that too whistles like the first.

Now they say they cannot offer me a solution which works and to return it - ***?

They of course blame the car, but consider this:-

The lead carrying your precious music signal from the Gateway to the radio is unscreened wire.
A car is about the most electrically noisy environment you can get (even without faults), so a unit should be screened against it.
The OE 6-disc player has a screened lead and does not suffer ANY interference. I rest my case.

Take your chance, but in my opinion, they are not fit for purpose. No doubt they work in many installations, but the basic design is flawed from a screening perspective so you take pot luck.

DICE are cheaper now anyway.