I have been searching for a tutorial for a compression check on my 99 E300D and can't find one. Anyone out there have any tips?
I have a compression test kit, but do I need a special adapter to perform the test at the injector?
Should I disconnect the fuel shutoff plug at the IP?
Cold engine or hot engine?
What numbers am I looking for?

I have 2 issues with this engine, one issue is when the engine is cold during the winter months it starts fine then approximately 3 minutes later it idles very rough then goes away after a minute or 2. It only happens at the first start of the day and only at idle. This problem does not happen during the warmer months. This problem got a little worse this winter.

The other problem is after the engine has been running and up to temp, then shut off the engine, during the next start the engine will crank for 3-4 seconds and sputter before it starts, then it runs fine.

Thanks,

Mike
99 E300D 220K