Replaced the OVP to cure the hot start problem. Will see if that fixes the problem for good.

I still have that nagging problem with the pulsating idle (tach needle bounces between 500-1000 rpms). Car runs fine otherwise. Problem seems to occur when car is stopped, and usually worse when in gear.

Disconnecting the air flow meter got the idle pulse to cycle slower, so I tried replacing that unit, but problem persists.

Any ideas out there?

This has been a great forum...within the month of April I have been able to correct three other problems that have plagued this car for months...

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car