I was adjusting the valves on my 1968 280SL and noticed on of the nuts had been rounded off by the last mechenic. I know mercedes -Benz makes a tool to releive the tentsion on the valve spring when removing this part from the cam to replace the worren part.

Can someone tell me the part number for this tool. I know I did not speak to clearly but I cannot get the factory tool to budge this nut , so I think now it is a replacement job.

Thank You
Bob Geco
310-839-8337 work