(08-01-2013 12:26am)dodo Wrote:  I'd noticed a similar problem with my car (together with a hot oily smell occasionally inside the car when idling for long periods such as in heavy traffic) but not the DPF as it's a petrol Si4. Took it to the dealership before Christmas and they diagnosed the problem causing both smells as a leaking heater hose union which they tightened but couldn't completely seal. Currently waiting for the new hose to come in and be fitted so will let you know if this fixes the problem.