I've recently purchased a nice B7 A4 S-line 2.0 TFSI cabriolet. 2006 and 10000 miles
When the revs are at around 1200 there is a quite loud low frequency hum in the cabin. Sounds a little like the engine is about to stall, but revs are too high for that. The car is multitronic.
It seems to be...
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