Transmission or Transfercase issue
Thread Starter
Newbie
Joined: Mar 2014
Posts: 14
Likes: 0
ML550
Transmission or Transfercase issue
Hi,
Wonder if anyone experienced the same issue where the vehicle (W166) failed to engage forward when the car was put into drive, and when stepping on the brakes to lower down the revs, a grinding sound could be heard?
Thanks
Wonder if anyone experienced the same issue where the vehicle (W166) failed to engage forward when the car was put into drive, and when stepping on the brakes to lower down the revs, a grinding sound could be heard?
Thanks
Junior Member
Joined: Apr 2014
Posts: 45
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Ml350 bluetech
More details
Can you please give us more details on your car? YOB, BTC or Gas,... Etc
Junior Member
Joined: Apr 2014
Posts: 45
Likes: 0
Ml350 bluetech
Trouble with tramsmition
Ho to the dealer an let them check the upper tranny, the y also have to drain the oil and see if there is metal in it! Then they should repar it and reinstall the software with the star system
Member
Joined: Dec 2013
Posts: 121
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2013 ML550
I have a 13' ML550. In the past on two occasions while driving at a steady speed the truck went into neutral. Gear selector said it was in drive. Had to pull over, turn off and restart the engine a few times to get it back to normal. This wasn't the tranny slipping, it was disengaged. Never had any grinding with it though. I do get a slamming into gear when coming to an abrupt stop while in sport mode. It feels as though I was rear ended. I'm used to it by now. When somebody new is in the car I just look at them, smile and proudly say "Mercedes, the best or nothing!" As an aside, you don't have an actual transfer case unless you have the on/off road package.
Thread Starter
Newbie
Joined: Mar 2014
Posts: 14
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ML550
Thanks for the input, I brought in the vehicle today to check on the problem. Hopefully, when I speak to the service advisor tomorrow, he might be able to explain exactly what might have caused the issues.
Thread Starter
Newbie
Joined: Mar 2014
Posts: 14
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ML550
I got back my vehicle. The dealer couldn't replicate the problem so all they did was update the software.... Very disappointed that they didn't try to find the cause, but at least it is documented. If I encounter the issue again, I will bring it back to the dealer.
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Member
Joined: Dec 2013
Posts: 121
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2013 ML550
The cause is that the 7G transmission has problems. They need to start using the ZF 8 speed that is raved about in every Auto Union/BMW/Jag etc. My transmission has been "reflashed" and "updated" enough times that I don't bother mentioning anymore. Definitely the weak link in the 550's powertrain.
Last edited by Kenn1926; Apr 25, 2015 at 09:49 PM.
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