I looked at some of the other threads and have not had any luck. I am hoping some fresh minds might be able to help.

When I take the car out of gear and put it in park (auto trans in this car) the engine revs up to about 2k for a few seconds and then settles down too about 1,200 (still too high). In gear it idles fine at about 600-700 or so. I am hoping that what ever is wrong will also fix the high idle as well as the racing idle.

Is there something connected to the trans that controls the idle? I have replaced the idle control valve, the hoses going from the valve that go to te valve cover, and the one going under the IP. The coolant temp sensor is new and kicks the primary fan on at 100C.

Any ideas?

Thanks

David

__________________
Sent from an agnostic abacus

2014 C250 21,XXX my new DD ** 2013 GLK 350 18,000 Wife's new DD**

- With out god, life is everything.
- God is an ever receding pocket of scientific ignorance that's getting smaller and smaller as time moves on..." Neil DeGrasse Tyson
- You can pray for me, I'll think for you.
- When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours.

After owning 5 of those beasts... the most common fault is the air flow position sensor.

Available only with the air flow housing.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Where/what is that? Is it the MAF thing under the air filter that cost 15 billion dollars to replace?

__________________
Sent from an agnostic abacus

2014 C250 21,XXX my new DD ** 2013 GLK 350 18,000 Wife's new DD**

- With out god, life is everything.
- God is an ever receding pocket of scientific ignorance that's getting smaller and smaller as time moves on..." Neil DeGrasse Tyson
- You can pray for me, I'll think for you.
- When you understand why you dismiss all the other possible gods, you will understand why I dismiss yours.

IF that turns out to be the problem?? 90% of the time it is..

You will need MB part numbers 000-074-23-14 ($730), 103-141-00-90, & 102-070-01-74.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

I would first check for vacuum leaks.

Steve

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'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7