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Old 09-22-2007, 06:26 PM   #1 (permalink)
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Date registered: Sep 2007
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Stuck in First

Our ML320 is stuck in first. No other lights are on... PLease help...what should be do first/
We are going to try and reset the ECM by disconnecting battery then go get the computer read at Autozone.
Just wondering what some typical causes of this could be/
Thanks!
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Old 09-22-2007, 06:51 PM   #2 (permalink)
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Unfortunately, one likely cause is the valve body within the tranny. On earlier MYs, the body was not shielded from settling grit so over time the small hydraulic valves became clogged. It is possible that a tranny flush and new fluid might cure the problem but that should only be tried after looking at the fault codes to eliminate other possibilities.
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Old 09-23-2007, 12:29 AM   #3 (permalink)
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If you disconnect the battery cable, that will clear the codes that are presently stored. Just go have the codes read and let's see what they come up with.
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Old 09-23-2007, 06:25 AM   #4 (permalink)
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Date registered: Jul 2007
Vehicle: Darkgreen 2001 ML 430
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I have had the same problem once. It was quite a cold winter and our ML430 got stuck in first too, this is a urgent/security mode. In our case it was due to the gearbox oil level which was too low. They just replaced a leaking bearing after checking out if there were error codes. Good luck.
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Old 09-23-2007, 12:43 PM   #5 (permalink)
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What year is the ML? Did the gear shifter get wet?
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Old 09-23-2007, 02:14 PM   #6 (permalink)
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another possibility

Another possibility is the gear selection position sensor may be bad.
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Old 09-23-2007, 11:33 PM   #7 (permalink)
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Quote:
Originally Posted by brandynmarie View Post
Our ML320 is stuck in first. No other lights are on... PLease help...what should be do first/
We are going to try and reset the ECM by disconnecting battery then go get the computer read at Autozone.
Just wondering what some typical causes of this could be/
Thanks!
Can the gear shifter be moved ?
Or is the truck in limp mode ?
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