Shifter Stuck In Park - No Fault Code Set - Mercedes-Benz Forum

 
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post #1 of 7 (permalink) Old 03-07-2007, 08:58 PM Thread Starter
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Shifter Stuck In Park - No Fault Code Set

Ok this past Sunday, did the unthinkable and spilled my Coke right into the shifter. After panicking and placing the gear selector into Park, all of a sudden the gauges go crazy and light up...check engine light comes on and I can no longer get it out of Park.

I shut the car off only to find it will not start again. Never mind traffic is backing up behind me as I can't even get out and push the car out of the way. 30 minutes later, car finally starts and I am able to shift into gear. Of course I am now in limp mode. I get home, clean out all the connections with contact cleaner spray, and using this great forum, figure out how to reset trans so I can get car to shift again.

OK, here is the problem; no trouble codes are set and I reset computer. But I can not get the shifter to release from Park unless I use the emergency release. I read the threads on the brake switch possibly causing this, but the brake lights come on. Can a faulty brake light switch still cause the shifter to stick in park even if the brake lights are lighting up?
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post #2 of 7 (permalink) Old 03-07-2007, 09:19 PM
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I've seen at least a half dozen threads that began exactly this way. If you search around here, and maybe one or two other forums, you can find more company for your misery--and maybe some ideas about what to do. But if I were you I would take the car to my dealers and have them take apart and clean all affected places and parts. Things may get a little better w/ time to dry out and wear off the sticky drink, but I think you may have trouble of various kinds, off and on, for as long as you own the car. In any event, I wish you much luck. Report back from time to time and let us know what you do and how your car is.

Don't believe everything you think
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post #3 of 7 (permalink) Old 03-08-2007, 12:09 AM
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Oh yes, threads with coffee or coke spilled into the shifter or the roof left open on a rainy day, a search should help.
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post #4 of 7 (permalink) Old 03-08-2007, 04:21 PM Thread Starter
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Yes, have spent several hours and the only thing I could find is the issue with the brake lights or...take it to the dealer. I have already had one less than positive encounter and am reluctant to go back.

What I plan to do is remove the unit and see if the solenoid pin might be gummed up, or something similar. It strikes me as odd that with no trouble codes being set, that something could be wrong with the shifter circuitry at this point.

I must add that placing an unprotected sensitive circuit board in the open and not in its own box, is just asking for trouble. The fact that Americans like their beverages in the car (who doesn't) and not planning for the inevitable spill does not impress me. I know there are many points to be admired about Merc but as this is my first Merc, I am beginning to wonder what all the fuss is about. I just expected more from such a touted brand. Anyway, VERY frustrating. Thx to everyone for any advice you have.

When I pull it out, I'll post pics.

Last edited by stoian1; 03-08-2007 at 04:26 PM.
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post #5 of 7 (permalink) Old 03-08-2007, 11:16 PM
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Quote:
Originally Posted by stoian1
Yes, have spent several hours and the only thing I could find is the issue with the brake lights or...take it to the dealer. I have already had one less than positive encounter and am reluctant to go back.

What I plan to do is remove the unit and see if the solenoid pin might be gummed up, or something similar. It strikes me as odd that with no trouble codes being set, that something could be wrong with the shifter circuitry at this point.

I must add that placing an unprotected sensitive circuit board in the open and not in its own box, is just asking for trouble. The fact that Americans like their beverages in the car (who doesn't) and not planning for the inevitable spill does not impress me. I know there are many points to be admired about Merc but as this is my first Merc, I am beginning to wonder what all the fuss is about. I just expected more from such a touted brand. Anyway, VERY frustrating. Thx to everyone for any advice you have.

When I pull it out, I'll post pics.
Your problem may be different from the others reported here but I tried a search for "spilled coffee" and got quite a few hits, like:
http://www.benzworld.org/forums/w208...coffee+spilled

I agree that the circuitry is too sensitive, should be better protected. But I don't by the comment "Americans like their beverages in the car, who doesn't". MB has hesitated coming with cup holders etc. and only have those from high pressure from US mainly. In Europe they do provide the option "no cup holders in the front at least". I don't remember if it is the standard option and then cup holders as an extra option but without additional cost. In any case, I would not accept cup holders in my car as long as I have that option and can still buy an MB. To me the place to eat and drink is somewhere else than the car (water bottle could be fine but don't do even that, our climate helps here too). Fast food anyway is not as popular in Europe...

Anyway, always good if members post information how their problem finally got solved, will be waiting.
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post #6 of 7 (permalink) Old 03-09-2007, 09:56 PM
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Go to a computer store and get a couple of tall cans of compressed air [the kind you clean out your keyboard with - you do clean your keyboard don't you??] and spray them in there. That might clear it up but it has most likely gelled up by now.

There is a switch that makes you push the brake pedal to change from park to other gears that gets FUBARed and that sounds like what you have going on. The little bugger is pretty expensive but fairly easy to replace yourself if you are DIY inclined.

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Being smart is knowing the difference, in a sticky situation between a well delivered anecdote and a well delivered antidote - bear.

Last edited by mcbear; 03-09-2007 at 09:59 PM.
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post #7 of 7 (permalink) Old 03-29-2007, 07:53 PM
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sounds like brake switch behind ure brake pedal.its not sensing that u r pressing ure bake pedal so it wont let u in gear.
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