Just for the record guys. My dad has a Merc CLK and has rust on three arches and Mercades wont sort it out.
The car has a 30 year anti corrosion warranty and unless it has a hole from the inside out they wont cover it
He's just sanded it down now and touched it up
OK, its a '99 but has only done 38k miles and garaged, bought it from new.