M.B.DOC,
Thank you very much, that's exactly were it was. What made it confusing was the fact that I received the wrong part and was trying to find the old match. I installed the new one and the compressor is cycling properly now.

I continue to be amazed by how good this forum is, I have been driving Benzes for twenty years and just recently discovered this site.
Keep up the good work and thank you very much.

Armindo