Update

Went back to stock size tires and rims this week.

I did not notice at the time (got busy with work etc after I posted this and forgot about it) but once the tires were off the car it was totally apparent that the fronts and rears are different diameters.

Today was the first chance to get out on the expressway.

Cruise control works perfectly now.

So as the saying goes, size matters. Especially tire size and W210 drivetrain electronics.

__________________
The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech