Quote:
Originally Posted by 325_bucks
I've just heard back from the dealer. They've had a good look and definitely can't find anything seriously wrong, but they did notice the offside front tyre is slightly worn in a strange pattern, possibly due to low pressure over time, but still legal. Also they said the offside rear is shaped slightly like a 50p piece! So if that's true then a combination of those tyres plus balancing is probably causing the vibration. Might be an excuse for a Michelin tyre upgrade all round!
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Perhaps it's a characteristic of 20" rims? They put two brand new Dunlop's on the rear (previously Bridgestone) and two nearly new Dunlops on the front (from another 640d) so as to not mix the tyres.