hello all, my 2008 passat with 1.9 bls engine is having trouble starting in the morning, only in the morning. It sound like if there is some air in the diesel circuit. A friend advised me to change the injectors seal. That solved my problem for a couple of week but the seal get consumed very fast (I've changed the seals two time now. in 2 months). Any one can help me to find out what wrong with that car please ?