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1999 ML320 Not Shifting - It's a Puzzle

432 Views 3 Replies 4 Participants Last post by  Witek_M
Hello All,

I'm hoping someone here can help me identify the problem with my transmission. My 1999 ML320 needed the motor mounts replaced. It was shifting perfectly, and I put it in the shop. The mechanic explained that he could either unplug everything on the engine and remove the engine to replace the motor mounts (a 16 hour job), or he could lift the engine (as is) with a jack to replace the motor mounts. The goal was to save time/money. It turns out that this is what most knowledgeable mechanics do. However, he didn't know he had to remove the shifter.

When the ML320 came was reassembled, the transmission wouldn't shift, and the shifter was broken. I bought a used shifter in very good condition on ebay. We installed the new shifter, and the ML320 was shifting again... but, only for about 10 minutes. We decided to check the transmission fluid. We noticed that the transmission fluid was orange/silver... metal shaving in the transmission. We chan ged the transmission fluid, and the ML320 was shifting again... for about 10 minutes. Then it started getting stuck in specific gears, off and on ( shift up to 4th, but only shift down to 3rd at red light, then back up and down randomly).

Upon further inspection, the mechanic noticed that the connector on the conductor plate of the transmission was damaged, so I ordered a new conductor plate and we replaced it. The ML320 still doesn't shift automatically. It will engage 1st through 4th gears if I shift it manually, but it won't cycle through the gears automatically. Does anyone have any ideas of what to look at next? Any help is greatly appreciated.
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Welcome to the forum amminventory,

Please Complete your Registration Profile by adding the year and model of your car, so it will show next to every future post under your avatar.
Members are not likely to search for the one post the model of the car is mentioned.

respectfully, I dont believe you indie knows what he is doing, based on your post.
Find one that knows these older MBs and w163s.
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