Cruise control out of control…

[Funtasto]

…after having the tyres changed by the dealer, the cruise control stopped working as before: now, if set for example to 120kmh it goes automagically up 123kmh, always 2-3kmh higher as displayed in blue - also, it „pumps“ almost all the time, slightly accelerating and breaking alternating. The dealer has no clue and did not change anything except the tires. Does anyone has the same behavior lately? Perhaps the lower temperatures? In any case I have an upgrade from R32 to R34 scheduled soon, but my hopes are low that it will fix this specific problem…

 

[CybersterWatcher]

Silly question, what PSI does the car think the tyres have, and how does that compare to an external reader?

 

[leomindel]

What size tyres have you now got on and which model Cyberster to compare to the factory spec.