Does anyone have more info about the 722.9 transmission problems? - Mercedes-Benz Forum

 
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post #1 of 3 (permalink) Old 03-04-2013, 09:58 PM Thread Starter
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Unhappy Does anyone have more info about the 722.9 transmission problems?

I've started having problems with my '06 ML350 shifting hard, and sometimes sticking in 1st or 2nd gear. It works again after killing/restarting the engine. I'm pretty sure it's the well documented bad speed sensor problem.

I've seen a lot discussed about the bad speed sensor on the valve body, and the cost of repair, and how common the problem is. Mercedes doesn't seem to want to admit there is a problem and it really pisses me off.

I would like to get a feel for how many other people have had this same problem.

1. Have you had this problem with your transmission and how was it resolved?

2. Has anyone heard of a recall for this problem?

3. How can we make Mercedes take responsibility for this problem?


P.S. While Googling I ran across a shop that will repair the 722.9 ECU for a pretty good price.

Here's a link to it: Untitled Document

Does anyone know of a shop around the Dallas area that could do this?
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post #2 of 3 (permalink) Old 03-05-2013, 02:04 PM
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Search for S-B-27.00/120 in the forums. There are several relevant search results that apply to your questions.

Schaeffer
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post #3 of 3 (permalink) Old 03-06-2013, 07:22 AM
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One other note: I just called my local MB dealer and was quoted $446.00 for a new electronic transmission control unit (Y3/8N4)

Of course there's trans fluid, filter, gasket as well. Then there's the transfer of the data from your old ETC to the new one.

Just FYI for cost estimating purposes
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