Has anybody any experience with oil leaks on the 2.5 V6 tdi? Our A6 V6tdi (1998) leaks oil since we bought it due to poor servicing by the previous owner and non replacement of the engine breather filter. This particular engine is well known for engine block pressure and with the breather blocking block pressure builds up until something blows (oil seals). I have already changed breather filter,oil filter housing and seals,rocker cover gaskets,sump gasket and still she leaks all though minimum it's still enough to be embarrassing if we are invited to friends who have a nice new paved drive!!! I reckon that the oil has to be coming out of the crank shaft seal and with a cam belt change coming up in the near future would like to change at the same time. Any one had this problem & cured it?