The only 280 AMG car I ever saw was a 280SL in late 1983, it had a 3.6 AMG motor. That looks like a euro spec 280SLC. I suspect it was converted to US spec buy a company called AMG that did grey market conversions back then. If the owner has documents supporting the miles it's possible the speedo was run forward 7,500 miles when new, it could have less miles than it shows.

I never saw a grey market AMG car with the base model interior. Not impossible, but no that just looks like a very cool 280SLC.

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1981 240D Four on the floor, Orient Red over Parchment, bought with 154,000 but it's a daily driver and up to 180,000 miles, mostly original paint and all original interior.