Have had this question nagging me for some time and no one I've questioned had THE answer as MB would.
A while back, Mercedes would use radiator caps with the marking '100' on them. As engine temperatures rose due to better burning and emmissions the caps were changed to '110'. The latest versions are now reading '120'. What do these markings relate to? Or is it some DIN...Deutschland Invented Number?
300SE, 300CE, C280Sport, 190/5.0