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Glass Tailgate failures

Electrical and Electronic

Vehicle Information: Model : Cayenne; Year: 2004; Mileage: 10,000;

Twice the rear glass tailgate door has failed. It unlocks & partially releases for no reason (meaning I haven't opened it or the full tailgate or hit the unlock button). It does it at random. Sometimes I can relock it; sometimes it won't fully release or relock. So, I have to drive it, rattling loosely until the dealer can fix it. The dealer has replaced the lock mechanism twice. The question is, is this a design flaw & I'll have more episodes? (I've had my Cayenne in for problems 8 times in the first 11 months I've owned it; mostly electrical gremlins. So, I'm wondering if this is another repeat offender.) Thanks

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