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Transmission problems with our new GL320

8596 Views 9 Replies 5 Participants Last post by  Steve Birge
I posted this on the MBworld forum also:

I picked up our week old GL320 yesterday from the dealer after dropping it off for service and the tranny still downshifts too early. The 3-2, and 2-1 downshifts occur too early and induce engine breaking.

According to the work order the code they used to try to resolve the problem was:


I also had a major transmission clunk yesterday just after picking it up from the dealer while driving in stop and go traffic at about 25 mph. As I recall, it happened as I gently rolled on the throttle after coasting for a bit.

I am so impressed with this vehicle, yet this is putting a damper on it. The downshifts are totally unnacceptable. It's not something minor that I can ignore. At this point I'm not sure what to do except tell the dealer about it and hope they have another update for the electronics to try.
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str8line - it could be a "temporary" issue but I would definitely recommend taking it in to dealer and documenting the problem. From my experience with transmission, I had 2 dealers apply 2 updates in less than a week. My point is that it looks like they have frequent software updates for this transmission and it won't hurt to have yours updated to most recent version.
str8line said:
He did notice the hard shifting but didn't think it was too bad.
That, unfortunately, is one response you have to turn a deaf ear to. He didn't pay for the car, did he? When I had my transmission issues, I had SE, SA, and, SM, all drive it and they all repeated, like parrots, we don't see/feel any issue. Politely but firmly tell them that you think there is a problem and they should be fixing it. Ask them to share details on what TSBs they applied, etc. Don't make it personal but let them know that you won't take NO for an answer. Last option is calling MBUSA and getting them involved.
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