Dear All,
I recently bought second hand W124 E 220, which I am currently restoring. When Control Unit was being removed for painting, it had in writing saying "180 (km/h) Speed Limit (see attached picture) which previous owner does not have any idea.

W124 E 220 sports M111.960 engine, which is same as the C220's M111.961. I have not driven this car at high speeds, but once when I tried it hit max of 170 km/h, I believe these engines should do at least 210 km/h presently it does 100 km/h @ ~2500 RPM and redlines @ 6250, peak power of 110KW/@210 NM is @ 55000 RPM.

So my question is can speed be limited my some kind of re-programming the ‘Control Unit’? How does this work? How do I change to factory settings? Also can ‘Control Unit’ from some other model say E 320 be used in E 220?

Thank you

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