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So Currently The car has about 69,200 miles on it. Transmission has always been smooth until today randomly starts jerking the car like crazy while downshifting, or shifting from neutral to drive. Instantly I took the car to Mercedes service and got the fluid changed up. They said there was no metal shavings in the old fluid and they said it’s unlikely for the transmission to be broken, and stated they never have seen a transmission in these cars go out. They told me to drive it a week and the transmission “should relearn” sometimes they have software issues. My concern right now is I am very confused on what to do. I do have extended warranty however they will ask for service records in case the car needs a new transmission. Last time I was in service at 60k miles I had done spark plugs and oil and they had said they recommend transmission fluid and I asked if it was ok to do it at 70k service along with a brake flush and the dealership told me no problem it’s due at 60k just make sure not to go past 70k miles. Told me I should be fine. Now if I make a claim would they make it a problem that I changed the trans fluid at 69200 miles ? And how would they see it like this guy changed his fluid and right after made a claim for transmission? I’m worried to get denied for coverage. I don’t know if I should listen to the dealer and drive a couple days and let the car “ relearn “ or make a claim immediately? After the new fluid the car was running like it did before however after about 25 minutes of driving when I’m coming to a stop it started jerking downshifting 3-2 like crazy. Upshifts are smooth as butter. After I got home I put the car in reverse than drive than back to reverse then drive going back forth testing and on the screen it said “ transmission malfunction stop “ I turned the car off immediately. Then turned it back on it was fine. Haven’t driven it and it doesn’t say anything is wrong. What would be the smartest thing to do, if I keep driving it thinking it would relearn but if it doesn’t and I need a new tranny would the warranty deny the claim and bs m saying I kept driving the car and that caused further damage. Has anyone had this junking issue before or dealt with warranty ? What are your suggestions
Sorry to hear about your transmission problems. Sometimes a transmission refresh can fix this issue. Mercedes use to be able the reset the transmission’s learning history, I believe that old transmission re-learn procedure no longer works on new Mercedes. Sometimes if you drive the car in stop and go traffics too much or baby the car, it will learn bad habits which results in jerky shifts. After a re-flash, taking the car out and drive it aggressively once a while might also help.
Sorry to hear about your transmission problems. Sometimes a transmission refresh can fix this issue. Mercedes use to be able the reset the transmission’s learning history, I believe that old transmission re-learn procedure no longer works on new Mercedes. Sometimes if you drive the car in stop and go traffics too much or baby the car, it will learn bad habits which results in jerky shifts. After a re-flash, taking the car out and drive it aggressively once a while might also help.
Just took it on another drive this morning, everything worked fine until about 20 minutes. There is no issues while accelerating at all, I was flooring it all the way from 1st to 9th gear no problems switching up smooth at high rpm’s and low. Downshift is not a problem at all in the higher gears however once the trans warms up while coming to a stop 4th to 3rd very minor jerk almost not noticeable but 3rd to 2nd is stupid rough. Switching from park to drive has a tiny lag and jerks into it but like I said no issues switching gears up. I had the 2017 model of the same car before and and it always felt like tiny little bit rough while gears came down then I got the 2020 was exactly the same way. And I figured that’s just how the trans was on these cars. However now that became times 20 almost. In my experience from other vehicles if something is up with the tranny it would slip out of gear or have the same issue switching gears up or down. The gears on my car feel rock solid. Think of the feeling like It’s as if it’s a manual transmission and you yank the **** out of the clutch rye L.
Going from Park to Drive must also release the brakes. My E300 won't move until I apply throttle after shifting from Park to Drive. I feel a jerk when the brakes release.
Going from Park to Drive must also release the brakes. My E300 won't move until I apply throttle after shifting from Park to Drive. I feel a jerk when the brakes release.
Man at this point I’m so disappointed with Mercedes. They don’t make these cars the way they used to anymore. It’s pretty sad to be honest. I didn’t spend all this money on this car to be on forums trying to figure **** out. Mercedes engineers should be embarrassed of their work. I just want to go in front of the dealership and set this piece Of **** on fire.
Man at this point I’m so disappointed with Mercedes.
They don’t make these cars the way they used to anymore. It’s pretty sad to be honest.
I didn’t spend all this money on this car to be on forums trying to figure **** out.
Mercedes engineers should be embarrassed of their work.
I just want to go in front of the dealership and set this piece Of **** on fire.
These great cars are designed to have a thousand ways to disfunction straight from factory but keep running in degraded modes.
Dealers can not be too creative to fix poor shifts under warranty without a charge account. It's only up to the factory to produce reliable vehicles.
The rough up/down shifts are caused by poor timings. The shifts history and adaptations really are helping to smooth things out, not the other way around unless shifts are delayed then learnings are of no help.
We could reasonably expect this decade old issue to be retired by now ...
I've owned virtually every brand of sedan for sale in the US. Other than the very expensive brands - RR, Bentley, Maybach and Aston Martin - Mercedes ranks very high on my list when it comes to features, quality of materials, fit and finish. Yes, there are cars with high ratings from the mass media, but most of those ratings only consider the operating and repair costs and do not take into consideration the quality of materials, fit and finish. There are brands I won't consider buying regardless of their ratings because of solemn promises I made.
Man at this point I’m so disappointed with Mercedes. They don’t make these cars the way they used to anymore. It’s pretty sad to be honest. I didn’t spend all this money on this car to be on forums trying to figure **** out. Mercedes engineers should be embarrassed of their work. I just want to go in front of the dealership and set this piece Of **** on fire.
See if they are willing to do SCN coding, and/or stand-still adaptation, on-road adaptation, or forced adaptation (all is done through Xentry)
Just took it on another drive this morning, everything worked fine until about 20 minutes. There is no issues while accelerating at all, I was flooring it all the way from 1st to 9th gear no problems switching up smooth at high rpm’s and low. Downshift is not a problem at all in the higher gears however once the trans warms up while coming to a stop 4th to 3rd very minor jerk almost not noticeable but 3rd to 2nd is stupid rough. Switching from park to drive has a tiny lag and jerks into it but like I said no issues switching gears up. I had the 2017 model of the same car before and and it always felt like tiny little bit rough while gears came down then I got the 2020 was exactly the same way. And I figured that’s just how the trans was on these cars. However now that became times 20 almost. In my experience from other vehicles if something is up with the tranny it would slip out of gear or have the same issue switching gears up or down. The gears on my car feel rock solid. Think of the feeling like It’s as if it’s a manual transmission and you yank the **** out of the clutch rye L.
If your transmission jerks when shifting into drive from park, the reflash will not fix the problem. The issue is more likely to be mechanical or electrical, perhaps when the tranny warms up, something overheats such as a solenoid or a sensor.
If your transmission jerks when shifting into drive from park, the reflash will not fix the problem. The issue is more likely to be mechanical or electrical, perhaps when the tranny warms up, something overheats such as a solenoid or a sensor.
What about a clunk noise when shifting from Drive to Rear and jerk as well?
If your transmission jerks when shifting into drive from park, the reflash will not fix the problem. The issue is more likely to be mechanical or electrical, perhaps when the tranny warms up, something overheats such as a solenoid or a sensor.
they are still diagnosing it. Hope didnt do damage to the gearing. The dealership did mention that the fluid didnt have any metal shavings. Very confusing
These great cars are designed to have a thousand ways to disfunction straight from factory but keep running in degraded modes.
Dealers can not be too creative to fix poor shifts under warranty without a charge account. It's only up to the factory to produce reliable vehicles.
The rough up/down shifts are caused by poor timings. The shifts history and adaptations really are helping to smooth things out, not the other way around unless shifts are delayed then learnings are of no help.
We could reasonably expect this decade old issue to be retired by now ...
they are still diagnosing it. Hope didnt do damage to the gearing. The dealership did mention that the fluid didnt have any metal shavings. Very confusing
> Tall tab :
I believe you've had to pay to get a highly trained factory experts to produce this inflated estimate. I would ask for the written breakdown in parts and labor and the terms of the repair warranty.
What's gonna happen once you pay $4,000 with tax and your car still has the exact same poor shifts after 30 days of driving...?
> Valve conductor gamble...
I think dealership is aiming to fix this common isssue by doing "adaptations" and want to ensure the solenoids mesh filters are not plugged up by chunks of abused clutch material. Hence the valve body replacement.
> Transient fault?
I bet the tranny initial DTC fault is a stored transient error this is BEGGING TO BE RESET before any confirmation.
On the flip side if the exact same fault can be consistently reproduced then you have greater chances to get it fixed without painful aggravations.
Your poor gear shifts fall into the grey area of poor driveability performance... there is no error for that because: It is shifting!
> Wide working conditions:
Skinny clutch frictions are built to tolerate poor shifts for some times. Clutch packs are banged together to try and prevent slippery-clutch wear that would waste the whole tranny more quickly. Under poor conditions banging is the best option.
You are not alone with this excellent problem. Randomly delayed shifts can not be adapted precisely. MB patners have created the adaptive process and the ability to learn shift conditions but this is not effective for jittery CAN bus transfers. This is the same situation of random misfires: ECU learns the firing/injection delays from crank sensor but can not compensate from jittery crank RPM.
> Independent Master shop:
I don't suppose you're going to doctor this car yourself... so go build a relationship with a local indie shop run by a MB master tech... ask questions! Tranny are pretty advanced pieces of engineering.
The more ACTIVE FAULTS are bugging down the VIP Modules (ECU, TCU, SAM, ESP, EIS) the worse overall engine-tranny performance gets due to latencies.
That is what you're after here, not valve body conductor job.
warm welcome in the Highlands of UK 👏
Last edited by CaliBenzDriver; May 18, 2023 at 12:10 PM.
I experienced the same hard (almost violent) downshifting with my 2018 GLE. After multiple failed attempts at reprogramming, they finally replaced the transmission valve body. I had to wait on a new one to be delivered from Germany as these are not locally repairable. This fixed my problem. Luckily mine was covered under warranty.
I experienced the same hard (almost violent) downshifting with my 2018 GLE. After multiple failed attempts at reprogramming, they finally replaced the transmission valve body. I had to wait on a new one to be delivered from Germany as these are not locally repairable. This fixed my problem. Luckily mine was covered under warranty.
looking more and more like Mercedes had a bad batch of transmission valve bodies.
Do bad Valve bodies always throw a code? Or occasionally a CEL? or more accurately MIL (mb calls it apparently)
From my experience, minor tranny jerks or slippage does not alway throw a code, these types of heat related or restricted tranny valve body flow issues will get worst 0ver time and eventually throw a code.
From my experience, minor tranny jerks or slippage does not alway throw a code, these types of heat related or restricted tranny valve body flow issues will get worst 0ver time and eventually throw a code.
I see, ouch I wish it would throw a code if it at least slips once or twice because isn't it that if it slips for any reason there is something wrong or is it normal for a transmission to occasionally slip (I mean I don't think so?)
I see, ouch I wish it would throw a code if it at least slips once or twice because isn't it that if it slips for any reason there is something wrong or is it normal for a transmission to occasionally slip (I mean I don't think so?)
in my opinion, it is not normal for a tranny to slip, however, it is normal for the transmission to be caught in the wrong gear sometimes, especially while cruising and suddenly hitting the gas. The tranny is caught in a high gear because of its efficiency programming. If sudden acceleration is requested, it need to drop one gear or two to accelerate quickly which sometimes cause a jerk.
in my opinion, it is not normal for a tranny to slip, however, it is normal for the transmission to be caught in the wrong gear sometimes, especially while cruising and suddenly hitting the gas. The tranny is caught in a high gear because of its efficiency programming. If sudden acceleration is requested, it need to drop one gear or two to accelerate quickly which sometimes cause a jerk.
I see now that makes sense, just like how you are coming to a stop and then you suddenly accelerate when the light turns green, the transmission was prepared to stop but then your instructions are to accelerate again.
