The check engine light has been on constantly since the car was new. This last time it was for excessive camshaft wear. I have changed oil every 5,000 to 6,000 miles using the oil and filter from the VW dealer. A technical bulletin was published by VW warning of the potential problem and suggested replacement part, but VW refused to supply one dime to assist with the $2400 dollar repair bill to replace the camshaft. I have spent over $4000 on repairs for this car since it was out of warranty including replacing air bag sensor and activator ($700), a part in the the high pressure pump ($400), a cracked engine ventilation valve ($500), and the $2400 camshaft replacement. Who says lemons do not come from Germany. VW has refused to acknowledge the problem, although the technician at the dealership states that they published a technical bulletin for technicians and suggested a different cam than the OEM as a replacement. No wonder VW has less than 2% of the US auto market and the Japanese have over 50%. VW needs to close shoo until they learn to build a car. Maybe a vacation in Japan for these German engineers would help!