My 2003 C2 came fitted with Sport Designs and a spare set of (what I think are) Carrera twists done in gloss black plastic coat.
They're not my cup of tea and it looks like the C2 is going soon one way or another so need to find out what wheels these are before I attempt to get rid.
I'll get pics up later and details of all four but in a dark garage in the early hours I noted the following on one of the rears:
996.362.142.10 (the last two digits could be wrong - dirty wheel made it hard to see).
11J 18. ET45
POLAND
Pretty sure they will be C4s wheels so solid. Google the part number as if there hollow spokes they will be worth a lot more. Rears wont fit the C2, there widebody only.