Yes definitely one of the clips from the
obd port cover, last time mine was in for work one of the clips was lying behind the
obd port loose and rattling, when I prised off the cover to retrieve it, the other pinged off up into the fuse box!! I didn't want to start the car in case it was shorting something but couldn't find it. Eventually got it buried behind the trim housing the bonnet release. Moral of the story, watch what your doing with the clips. And yes do check everything cause the dealers ain't that good a doing everything up again.