My car doesnt register an oil pressure unless going 60 mph and at that it only registers at 2000 rpm. When its hot is drops to less than 1. Is this a sign my engine is going? I have 191,000 on the engine. Any ideas?

Stop driving/running it.

This requires direct hands on diagnosis.
You need a good local MB specialty shop for this issue.
Good MB Shops
http://www.peachparts.com/shopforum/good-mb-shops/

* It is possible the pressure sensor is bad = repair could cost $50.00 - $200.00 USD.

* The bearings and/or oil pump may be failing = repair could cost $1300.00 - $8000.00 USD.



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