This is what it says on the Porsche website:

"Servotronic is a sophisticated, speed-sensitive power steering system available as an option on all Cayenne models."


Is it an option or standard on the Turbo? I've read some people blame the wheel vibration issue at ~70mph on Servotronic. Those people were Turbo owners, and I have seen several Cayenne S owners say they don't have the issue.

I don't have Servotronic listed anywhere on my window sticker so I assume I don't have it, but I do have the ~70mph shudder intermittently.

 

servotronic is not an option on the CT, it is standard eqipment. From what I understand, the slower you are going the more power there is for the power steering. The faster you go, the amount of power steering decreases. This is how I understand it and I think it is the culprit for steering wheel shim cases...

I think servortonic == variable assist power steering