same question. 1982 280E euro (high compression version)
I have the same question concerning what to burn in my 1982 280e. It has a higher compression engine than the states version. I have the owner's manual, but it is in German and I can't read it. To confuse matters further, it was fitted with all sorts of anti-smog stuff when it was imported in 1985. I have been running premium, but I'm not sure if this is right. Can I damage it by running too high octane?