Omegaonne

So I took the E500 this weekend for a long drive to Vegas for my father-in-law’s birthday and coming home, my wife and I noticed that the car was downshifting funny between 20-0 mph. It seemed to jerk. Though it wasn’t noticeable, we nevertheless took the car to Fletcher Jones in Las Vegas to have it checked. They said that it was a software error in the transmission and needed to be reprogrammed. Now that I’m back in LA, I’m taking the car to the House of Imports tomorrow, but I was wondering if anyone has experienced this problem and what was the outcome. Thanks

Frank Wiesmann

it seems a bit jerky when you are crawling in traffic and it downshifts to second or first between 0 and 20 mph. Also, the upshifts seem a bit jerky when the engine is cold. Please keep me posted on the remedy performed.

DWP

Now that you mention it, I have noticed a slight "stumbling" when I back off the gas at low speeds, almost like a trace of the "bucking" a car with a stick shift will do if it's in too high a gear at low speed. My car has a different transmission from yours, though, so I don't know if the symptoms are related.

jameson75

I think I had the same problem, was exiting the 605 freeway the other day (it was raining), as I was slowing down, i felt a little jerking sensation. didn't think too much of it, the asphalt was wet, hasn't happened again. let me know what the house of imports says about it.

Frank Wiesmann

This is exactly what I am feeling too.

Barry45RPM

Are you sure its not just the car downshifting into a very low, low 1st gear at perhaps a mile or two an hour faster than what would be optimal? The jerk is much more noticeable in ver cold weather here & pretty much is acceptable/ignorable once the car warms up.

Frank Wiesmann

Hello Barry,

going uphill at slow to medium speeds I occassionally notice a jerky downshift, nothing violent but enough to be different than usual. I also notice a hesistation (kind of like slipping) shift when the engine is cold. I need to concentrate to notice it though. But as for the problem others I having, I can confirm that the car exhibits this off and on bucking jerking as if you are driving a manual car in too high of a gear.

Omegaonne

Hey guys, sorry it’s taken me a while to post back. I’ve been remodeling my house, so you know how that goes. Anyways I took it to the House of Imports in Buena Park and they said it just needed a software upgrade. After the upgrade, I don’t seem to notice it at all. Hope this helps.

sogashia

I too have had this experience with my E300TD 1998:

After about 5 minutes on the road, the car starts having a problem downshifting,,, a hard jerk when slowing down, between 20-15mph. Also, the car idles fine at stoplights, but if you put it in PARK, the idle jumps to 10-12 rpms and stays there. I took it in last week, they said it was fixed (bad front wheel sensors). NO FIX. i took it back and they tell me it needs a software update for the transmission. I get the car back today so I will let you know if this fixes it.

lig

Mine does something strange when going really slow down a steep hill. It is a pretty violent jerk. It feels like someone kicking the back of the seat!

Mercedes Benz #

Hey there. Our car appears to have the same problem...when at crawling speeds sometimes the car feels like it is lurching. Is there a specific upgrade or service notice for this problem? Im in Australia btw. Thanks.

Omegaonne

Software upgrade at the dealer is the remedy I received

steph280

I did notice some of the symptoms as well.

My advisor at house of import didn't even know what the pulsation dampner retrofit was (still doesnt). Can you recommend a service advisor there?

Thanks.

Frank Wiesmann

Hello,

I just wanted to give everybody with the jerking problem a further possibe cause that I picked up on a German forum. Apparently, there is a problem with coolant fluid leakking into the transmission and mixing with the transmission fluid. This then gradually damages the friction pads/linings of the torque converter lockup clutch. Remedy is to flush the transmission with 15 quarts of fluid or install a new one. Just wanted to let everybody know that if a software update doesn't solve the problem, this might.

steph280

Sounds like a plausible explanation, except this is occuring on my 05 with 1000 miles on it, and has been occuring since the car had only 15 miles.

It is very noticable early in the morning when I drive down the hill by my house. Feels like something is gripping, kinda like when you let go of the clutch too early on a stickshift.

Somebody on benzworld says dealer replaced his transmission "module" and fixed the problem. I couldn't even duplicate the problem the dealer let alone convincing my SA there is a problem. He just says "oh it's a Mercedes, they all shift hard." What a full of turd.

steph280

Just an update...

Just for grims I tried driving around in the C-"comfort" mode, and no longer experience this jerkieness in downshifting. If anybody is still experiencing this issue, can you try the C-mode and report back?

charliek

Hi guys,

I've been experiencing the same problems as you guys, ever since shortly after I bought my car from House of Imports (5/04)!

For me, the "jerking" (engine surging) occurs both while accelerating AND decellerating. It only happens at slow speeds (below 10mph) and when the transmission is in the default "S" (sport) mode.

It literally feels like riding in a car w/manual transmission, and the car kinda hesitates for split second, like its about to stall... and then hits the gas to prevent it, causing the car to "jerk"/surge/lunge forward.

You can skirt this problem by driving in C-mode all the time (although this is an unacceptable remedy!). I find myself having to do this when driving around VIPs, to save myself from the embarassment of this problem (50k+ car that rides like its being driven by a teenager who doesn't know how to drive stick-shift... even though its an automatic!). Since "C"-mode ignores the 1st gear, I'm assuming its a problem with the 1st gear on the transmission. Defective shift program maybe? (I'm not very knowledgable about the technical terms.)

It happens intermittently, but lately its been happening pretty often (maybe because of the warmer weather??). I'm at the point now where when it starts happening, I can almost force it to happen... simply by depressing the accelerator slightly and releasing it, and then quickly depressing the accelerator again slightly. In fact, it occurs the most when I'm crawling along in heavy traffic on the fwy, and accelerating in such a fashion.

Engine temperature doesn't seem relevant in my case. I can be motoring along for about 30 mins, then hit some traffic on the fwy, and then *BAM*... the engine surging begins.


I've gone at least 5 times to the dealer to get this fixed. The first time, my SA came back to me and told me that MercedesBenz was aware of the problem and was working on a "Parking Lot Software Update". Everytime I went in for another problem, I asked if the update was released yet, and each time I was told "not yet". Most recently, I went back again about 2-3 months ago for scheduled maintenance. I was given a new SA (my previous one doesn't work there anymore). When I asked the new SA about it, he didn't have any idea about what I was talking about. He even called a tech while I was there, and the tech didn't know anything about a "Parking Lot Software Update" either. And then they couldn't even "replicate the problem" that time, so now I'm all the way back at sqare one.

To the poster who reported that he got a software update to fix the problem:
After extensive driving, has your problem been remedied? I ask this, because I was also given numerous "software updates" and they didn't do jack for me. But if in fact, your software update did fix your car's problem, then perhaps the elusive "Parking Lot Software Update" really does exist and has been released... Please let us know how your car's doing now!

larryssf

My E-500 has just about 1,100 miles and from the beginning I noted that there is a damping effect at low speed that slows the car down when releasing the accelerator. It is not really that dramatic. I felt that it was more of a damping on speed to allow the transmission to slow the car down to save brake use. As the majority of reports are by E-500 owners, could this be a known factor in the new 7 speed transmission? I do not find the effect a problem as it is not that pronounced

This may be something entirely different from what is described above, but I thought it was worth mentioning.

charliek

Yea that damping effect at low speeds is something different than the "jerking" effect. I know what you're talking about though, and I've accepted that as being the norm for the car as its not very pronounced as you mentioned.

The "jerking" though is definitely pronounced, and definitely not normal.

Frank Wiesmann

Hi guys,

just wanted to let you know that the dealer changed my TCU and upgraded the software. Result: no more jerking! Hope this helps!

Dvinn

This damping effect is caused by the transmittion staying in 1st gear too long and not upshifting at the right speed. Although this problem can be solved by manually shifting to 4th gear instead of leaving it at D.

tuscanraider

I beleive that is very dangerous. You should keep both hands on the wheel, and limit 'jerking' to when you are at home alone.......or if you are at a stop light.

onesixeight

I've had this same jerky transmission issue with my '04 E55.

My car would surge when coming to a quick stop (ie. from 20-0) in heavy traffic. I was able to duplicate the problem and the shop forman performed a few adjustments. He reset the adaptive transmission programming, the found that some of my gears and the torque converter was out of spec. He readjusted those, and it's a lot better. The car still feels "confused" at times, but it's a lot more driveable now.

Topete

Is this a warranty service?

bimmerbenzman

All of the W211 chasis have this problem. if the dealership upgrades your TCU and you still feel jerking; it is the torque converter. exspensive fix