the wing mirrors?
Theres a plastic cover on the inside - take that off. Theres a ring with a few slots cut out. Get a small flatblade screwdriver and hammer and tap them loose (anticlockwise - as if undoing a nut - which is what it is). You should be able to unscrew. Then they just pull out
c spanner - costs about £35 from fiat, surprise surprise! i found a pair of long needle nose pliers do the job very well, gets a good grip on opposite sides of the ring, oo er