Hi All,

I was wondering if if anyone can shed light on a issue I have on my 2001 VW Passat 1.9tdi sport.

When I turn the Heater on, I can smell eith oil/fumes which gives me a bad headache.

Took it to garage yesterday and they took off the fuel filter and saw some leak there. they have replaced it but this morning I got in and again it stated to smell.

They had it on the ramps but could not see any other leak.

If I drive without the heater on it is fine but with this weather you need it.

Any ideas ? Is it a serious issue ? will it be costly if maybe VW diagnosed it ?

thanks