I'm at my wits end with my totally random no start with a warm engine. Everything is fine, I can hear the car try to start, but the engine doesn't turn, nothing.... similar to starting the car in gear (or trying to). So I assumed Neutral Safety Switch, so i had that replaced, problem IS better, but still might not start. I just keep trying and/or wait and it'll eventually start (up to 4 hrs). Lately, I've been flicking the OVP and the car will then start... perhaps my OVP has failed again at it's 2nd 70,000 mile mark? Only thing is... the engine doesn't turn as it would with a failed OVP. I get nothing.
What do you guys think?

THanks!

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)

Just an update...

Ever since I started flicking the OVP (the first & only time), the car has not yet failed to start ( - & - = +).

It looks like the failed part is the OVP. It's just weird because I get the engine turning.

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)

What is the part # of the OVP in your car? If it's the 52 45 replace it! If it's the 67 45 it's probably OK.

My OVP is the old part number! It's the 45, not 67. But it does say it's Made in Germany. Usually the austrian OVPs were bad, and germans good.
Anyway, i'm now using my original OVP (not sure why i kept it!) and the car is perfect again. Not for long i'm sure, I've ordered a new one, definitly 67!

thanks

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)

David,
What do you mean by "flicking" the OVP? Many thanks.
Thom

__________________
1987 300E
1967 Jaguar E-type Series I, 2+2

Flick... with my fingers. Or "tap" on the OVP.

__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)