5 degrees is not bad, any more and it becomes questionable. The general rule of thumb is replace the chain every 100,000 miles. I know there will be some that will disagree. It's not hard to do, and with the right crimping tool, can be done in a couple of hours. The last one I did was on the 300D, it had several degrees of stretch, a new chain made a world of difference. The worst one I saw had 12 degrees of stretch, surprised it even ran.

There are some users who will rent the correct crimping tool for a small fee and deposit. Check the tool rental forum. Others have used vise grips, it's a real pain in the ass to do, but can be done.

If you do decide to replace the chain, use a press on master link. Although it makes the job easier, I have not seen an "easy clip" link in years, they were discontinued from MB in the late '90's.

__________________
DO IT RIGHT THE FIRST TIME, DON'T BE A HACK
Political Correctness is NOT part of my vocabulary
and finally FIGHT CRIME...SHOOT BACK

'82 240D Stick
'85 300D Auto
Drove my first MB at age 16 1960 300SL W190