I'm not sure about the oldr model Benzs, but on my 1997 C36, if the tire diameter is not the same as stock, my cruise failed abover 120km/hr.
I had winter tires on adn tried it and it doesn;t work but after i put my summer ones on...viola..fixed.
Found this out when i took it back to the dealer to see what wrong. Took them 4 hours to figure that out and wanted to charge me for the 4 hours. I complained to the service manager and all he could basically give me was the finger. Sad but true.
1997 Silver AMG C36
OEM Advantegarde Grille
OEM Clear Corners
W210 Blinking mirrors
Zender Rear Lip Spoiler