I purchased an 05 Citroen C4 from a local small dealer on Wednesday of this week, and is very clean inside and out. I noticed on my way home a slight fumey smell coming from the a/c but thought it was down to it being parked inside for a while.

I went for a drive on the motorway and it seemed to clear but it appears to have returned and is more noticeable on short journeys. The car comes with a 3 month warranty and I was wondering if this would be covered by that, or do you have any suggestions to remedy it?