Outstanding Contributor , Bob's Your Uncle!
-----'83 280 SL----- 5 speed....The PIG
LOL. It's true.if you read the MB requirement , the gray market cars due to higher compression ratio , and hotter cams should use premium .you can put anything you want , but that does not mean it s right .
However...no knock, no ping....good performance...why pay more? And when I mean more...it's usually about $0.40 more per liter here.
I've run 91 AKI and 94 AKI....I really saw / felt / experienced no difference except on my wallet.