We have had a 2000 Passat 1.8 turbo for 6 months now. A couple of months ago it started to idle rough when put into gear. Took it tothe local Bremerton VW dealer. Cost me $78 to learn that you never take your car in for repairs without a check engine light on ? 3 weeks later a check engine light came on. $500 later, front O2 sensor and a combination valve, and the car still idles rough when put into gear and when coming to a stop. The dealer supposidly did the 40000 mile check up before I bought this car. Im wondering if new spark plugs and wires are in order or is there some fancy switch or solenoid gone bad somewhere. Any ideas would be appreciated. Thank you.