I had a scratch about 1 cm long on the bonnet when the car was delivered ! MB said they would have to paint the whole bonnet, that was very annoying . ( MB Bromley) .
when the car came back scratched headlights , and flat spot and 3 large round polish marks . the scratches on the headlight were reduced and the flat spot polished but the polish mark still there . sending it back tomorrow for other repairs and the paint to be checkout again . so DONT USE MB !!!.
also there is another company that MB recommends for repair and repaints. forgot their name, but if you call mercedes colindale, they will refer you. these other guys sit in hampstead and do jags and mercs + exotics.
if with first guys you can negotiate, the latter are expensive.