I've had 2 VWs before, 1993 Jetta 3 Converted to a 1.6D engine ROFL, and a 1995 Jetta 3 CSX, and now I drive a 2004 A4 2.0L Exec.
Jettas were amazing, that 1.6D was the ultimate students car! R100 bucks to go to Margate and back from PMB!
I bought the second Jetta for too cheap, and found out why a weeks later, clutch was on its way out, so i did the brakes, clutch, all cvs, welsh plugs, and all the crank seals for like R4000 i think a battery died on me too :-S
The Audi has been ok, the B6 audis have a plastic impeller in their water pumps, so that was changed under maintainence, only other thing that was changed was a bearing on the Aircon pulley system, oh and the Airbag light came on.
My Electric window also went, but cost R2600 to fix and a Driveshaft failed costing me R10k

. my 105000km service cost R830, and now the big service (Cambelt etc.) at 120000km is going cost R2500. i mention this because i see people being charged R3000k for a POLO! If you live in KZN, only buy VWs and Audis from Barons in PMB!!! i live in Durbs now, and i still take my car to PMB for servicing!
But seriously i love this car, 660km off a tank city driving and close to 800km on the open road!!! Dual Climate Control, Cruise control, 10 Speaker Audi Sound System, and ESP which has proved usefull...
Insurance at 22years old is a bitch tho :-S