The AWD models begining in 2002 have the new and improved version of the drivetrain. Except for the center exhaust pipe brace which should be removed, it is very reliable. The brace can be hit when bottoming out and is then pushed onto the driveshaft, causing an imbalance condition requiring the shaft to be replaced.
If you do not get the diesel engine, the light pressure turbo is quite fast enough. If you have children, make sure you get heated seats for the rear seats :)

The 04 - 05 models are very good, so long as you can get service history - of course.

Klaus
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Please answer, we need to know if the advice is good or bad. The 164 has a new home, all I am left with are 2 turbos :)