 I have a 2009 Tiguan. It was a great car until it hit 55,000 miles. First the Freon leaked out due to a faulty pressure switch. A few months later the check engine light came on indicating a cylinder misfire. Dealer said it was due to carbon on the valves and it needed an $800.00 service. Shortly after that the front crankcase seal went. Total for the 2 repairs $1423.11 for a car with 66,000 miles on it. Shortly after the PCV valve went costing another $500.00 for repair. Engine developed a oil leek after being at the dealer for an inspection then the check engine light came on indicating engine misfire... valves needed to be cleaned again. Finely sold the car at 75,000 miles. From reading other comments on the internet this is a common occurrence for this vehicle.