Diesel Engine Fumes inside Car - (now with pics) hi, I can smell diesel engine fumes inside the car - but not all the time - seems intermittent. I first noticed it the other day driving to work (A/C is set 20°) - but I thought it was coming from the car in front. However, I smelt it again on the way home with no car in front of me. It was faint, but definitely engine fumes. I opened the bonnet and had a good sniff between the clutch and brake fluid reservoir (as suggested on some forums) but couldn't smell anything. I know about the cracked manifold problem on these , and I don't think it has been done on this car. Car is a 2007 2.2 I-CDTI. Could it be anything else I can easily check before I book it in? Do really want to spend £100 or so for diagnosis if it is something simple. Thanks. EDIT - Fuel consumption seems still the same 45mpg in town, 63mpg on motorway.