I wouldnt have thought it would be worth it! You know what are they like with servicing etc... They'll do stupid things like "top up" all your fluids and then charge obscene amounts for them! This is what happened to my friend, what a load of sh*t, i had topped up the fluids and checked tyre pressures and everything, so knoew they were talking wan*k... unfortunately i didnt know until after she had paid...
Folks also took the passat to the dealers for a basic routine service, and they couldnt even work out what the correct spark plugs were, and the car just didnt run right afterwards, yet they didnt know why!! Same with MK4, the amount of co*k ups they made with it...
put it this way, from personal experiences, and from what i have heard everyone say (never heard a good word about a dealer, except the last time mine was there, in 1989) i would NEVER take my car there!!