Oil leak on 2003 Audi A6 Quattro

1 year ago I had an oil leak ("from the top of the engine"). They changed the manifold gasket and it was ok. Recently, after an oil change, my engine is again leaking oil (with a bad smell). What other gaskets may need replacement? My local mechanic says the oil is coming from the top of the engine.
Thank you, Enrique

Asked by for the 2003 Audi A6 Quattro
1 answer
If the oil is coming from the top of the engine then you most likely have a leak in the seals around the valve covers. This is not a serious condition in VERY small amounts; otherwise you must replace the valve cover gasket.