Thanks Frank,

I was lately changing a leaky (vacuum leak) control cable unit at the 400E....what a pain because there is just no space around the tunnel on a W124.
So my fear is that removing and reinstall the governor is no easy task with the transmission installed.
I'd need to take another closer look.
I guess the left side rear governor cap has to be clear and this access is enough to remove the governor?
How difficult is this job assuming there is access to the governor port ?
But even if I can remove the governor is there a method to see the wear and see if i can get a better governor...assuming they are available new or used?
Martin