I have the same problem on a 2005 280CDI estate. Trying to work out the correct part no to replace: seems to be A211267???? Q0? but there are lots of similar ones with different numbers. Any idea how to tell which ones are for 7-speed rather than 5-speed boxes? I thought that a A2112670124 Q06 would be alright, but them came across that exact numbered unit referred to as 5-speed. Any help?