Thanks for all your help guys with my idle surge when cold problems.

I did look at all of the threads after doing searches, but all the part numbers for the OVP suggest that the relay should be 000 540 67 45, or with 52 as the penultimate pair for the original.
Mine is 210 540 32 45.
Can I replace this with the new version above?

Or have I not found the OVP relay?
It's silver, behind the cover behind the battery, near a green realy, and a black relay marked "Kickdown", and has a 10A fuse on top.

Thanks all.

Barry
W124 E200 94 M111 engine. 103,000 miles.