Just ordered a new GLC 43 and the dealer said he'd throw in Stargard. However I am a bit nervous about frankly none too skilled labourers at the dealership slopping this stuff over probably not at all well prepped paintwork. And then making it more difficult to get the car detailed with the Stargard crap stuck to it. Should I just say "no thanks", or is Stargard harmless enough? And maybe even worth having? What do you reckon?