Not that fussed about age or mileage as long as it's got full service history.
Colour: grey, black, blue or silver (in order of preference).
Must have Milltek (or equally good) catback and DRC replaced.
I'd consider a remapped car as long as it's not too extreme.
Ideally I'd prefer a straight swap for my 2004/54 Mercedes W211 E55K. I know it's a long shot but there's no harm in asking.
