Fucking local VW dealer.
Serp belt just came in for my A4. Picked it up, came home with it, put it on the car, and it's too long. Called them up.
Dealer: "The VIN says the serpentine belt we sold you is the right one for your car. You were there, we looked it up, and we ordered the right one."
Me: "Can't be. The tensioner is loose, it's almost at the slack limit of its travel."
Dealer: "There's supposed to be some slack in the tensioner, it can't be 100% tight"
Me: "The damn thing is rattling at idle"
Dealer: "Maybe your tensioner's bad"
Me: "It's not. There's a pin it's hitting at the slack position when it's idling. The belt's too long. Trust me."
Dealer: "Read your VIN again"
Me: <reads off VIN over the phone>
Dealer: "Yeah, the car calls for the belt ending in E. That's what we sold you."
Me: <staring into the engine compartment, looking at the belt> "Belt says D"
Dealer: "Oh that's weird, they must have put the wrong belt in the box"
Me: "One sec, let me get the receipt. Oh look at that, my reciept says D too. You brought in the wrong part."
Dealer: "Oh... well, we can get an E belt tomorrow morning for you, there's one in toronto"
Me: "OK, I'll be in tomorrow with the old belt"
Dealer: "It's installed on the car now, right, and you ran it? Then it's used. We can't take it back. Sorry."