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Jeeze! My mind has been completely fuddled by camfollower's forum sig!! Who is she!!?
ALL cars, not just Mk5 GTI's can have minor problems and ALL cars need to be well maintained. The average car has over 5,000 components, any of which can need attention.
I've had my Mk5 DSG GTI for nearly 8 years from new and enjoyed 106,000 miles without any really serious problems.