Hello All,
I am restoring recently bought 1995 W124-E220 (M111.960), got the compression check done at local Mercedes dealer, the report is as below

Cylinder Compression
-------------------------------

1 -----> 9
2 -----> 8.5
3 -----> 7.6
4 -----> 9

The engine has done about 70, 000 kms on ODO meter, I am slightly concerned about the compression reading of the cylinder 3, do I need to worry? What could be the reason for the compression drop, should I do some more checks? The exhaust is clean without any trace of smoke.

According to WIS this particular model compression is between 7.5 to 10.5(fuel optimized), please see attached image (Stock-Compression.gif). I have also attached actual compression image (Actual-Compression.gif), sorry for poor quality of the picture.

Thank you

Attached Thumbnails