Jerking back and fourth at 30mph??
Thread Starter
Member
Joined: Jul 2007
Posts: 95
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From: Concord, CA
2005 E320 CDI 98k and counting
Jerking back and fourth at 30mph??
Wierd problem, at about 20-30mph the car is jerking back and forth, basically speeds up and slows down on its own with me holding a gas pedal steady!
Whats the problem?
05" 320 CDI
Whats the problem?
05" 320 CDI
MBWorld Fanatic!
Joined: Dec 2005
Posts: 1,690
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From: Irvine, CA
2008 E550, 2012 GL450, 2014 GLK350, 2015 S550, 2020 GLC350e
Hrm, I'm not an expert at this, but how about trying the ECU reset? Maybe you'r e just a bad driver and its memorized your habits 
Out Of Control!!
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From: North Scottsdale, AZ
'71 Pinto
Thread Starter
Member
Joined: Jul 2007
Posts: 95
Likes: 0
From: Concord, CA
2005 E320 CDI 98k and counting
Could it be the Idle speed regulator or RMP sensor? If there is something like that on these cars. Also this does not happen very ofter, 90% of the time everything is perfect.
Out Of Control!!
Joined: Jul 2003
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From: North Scottsdale, AZ
'71 Pinto
DTB specifically states “vehicle jolt at constant speeds or during gentle acceleration when torque converter clutch is applied > 40,000 miles”. Glycol contamination creates noticeable harsh engagement during gentle acceleration between 1200-2500 rpm, your call.
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Joined: Feb 2007
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E240
Quote:
Originally Posted by BLACKCDI
Don't know if it's a tranny problem, the jerking is consistant with RPM surging.
Could it be the Idle speed regulator or RMP sensor? If there is something like that on these cars. Also this does not happen very ofter, 90% of the time everything is perfect.
DTB specifically states “vehicle jolt at constant speeds or during gentle acceleration when torque converter clutch is applied > 40,000 miles”. Glycol contamination creates noticeable harsh engagement during gentle acceleration between 1200-2500 rpm, your call.
I am having the same problems, should this be covered under warranty? It has taken me around 10 trips to the MB Agent, and the chief engineer thinks it might be the clutch on my E240 W211, but cant say for sure, as he didnt really find anything wrong.
Would appreciate the help. Thanks
Originally Posted by BLACKCDI
Don't know if it's a tranny problem, the jerking is consistant with RPM surging.
Could it be the Idle speed regulator or RMP sensor? If there is something like that on these cars. Also this does not happen very ofter, 90% of the time everything is perfect.
DTB specifically states “vehicle jolt at constant speeds or during gentle acceleration when torque converter clutch is applied > 40,000 miles”. Glycol contamination creates noticeable harsh engagement during gentle acceleration between 1200-2500 rpm, your call.
I am having the same problems, should this be covered under warranty? It has taken me around 10 trips to the MB Agent, and the chief engineer thinks it might be the clutch on my E240 W211, but cant say for sure, as he didnt really find anything wrong.
Would appreciate the help. Thanks
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Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,632
From: North Scottsdale, AZ
'71 Pinto
I am having the same problems, should this be covered under warranty? It has taken me around 10 trips to the MB Agent, and the chief engineer thinks it might be the clutch on my E240 W211, but cant say for sure, as he didnt really find anything wrong. Would appreciate the help.
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Super Member
Joined: Jul 2007
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From: Sacramento California
2007 S550 (S65 Package)
hey guys i went to another guy bc after going to the dealer and them not being able to find out whats wrong with my car, and the other mechanic told me that it was my mass air flow sensor and the plug and plug wires. could this be it or should i check out further bc that air sensor is 400 bucks and the plug and plugs will probably come out to be around 300-350.
Newbie
Joined: Oct 2007
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E500
hey guys i have an e500 with 29000 miles out of MB warranty... it's jerking at about 35-40 mph and around 1200 rpm. Does anyone have the DTB to send me so i can take it to a dealership. I tried calling MB main office and they said there are no service bulletins on my car? my email is milepile83@yahoo.com
thanks
thanks
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
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From: North Scottsdale, AZ
'71 Pinto
hey guys i have an e500 with 29000 miles out of MB warranty... it's jerking at about 35-40 mph and around 1200 rpm. Does anyone have the DTB to send me so i can take it to a dealership. I tried calling MB main office and they said there are no service bulletins on my car? my email is milepile83@yahoo.com thanks
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,632
From: North Scottsdale, AZ
'71 Pinto
hey guys i went to another guy bc after going to the dealer and them not being able to find out whats wrong with my car, and the other mechanic told me that it was my mass air flow sensor and the plug and plug wires. could this be it or should i check out further bc that air sensor is 400 bucks and the plug and plugs will probably come out to be around 300-350.
The MB dealer should have easily identified any fault codes including the MAF sensor through DAS. Did the independent find and printout any fault codes? If so, if you paid a diagnostic fee to the MB dealer return with a copy of the fault codes and request a discounted repair to cover their initial diagnostic cost, the diagnostic cost of the independent, and better the independent quote for repair because of the error.
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Joined: Feb 2008
Posts: 46
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From: Michigan, West Side
2005 E320 CDI
Did anyone find out what the issue was here or whether it was fixed? My car is surging ever so slightly during light accelerations or going up a hill. Generally when there is a slight load on the motor. Interesting enough, it seems to do it more when it's in Sport mode and less in Comfort mode, but it still does it in Comfort. I am currently using comfort mode.
Any help would be great, thanks.
Any help would be great, thanks.
Thread Starter
Member
Joined: Jul 2007
Posts: 95
Likes: 0
From: Concord, CA
2005 E320 CDI 98k and counting
I am happy to report that after draining tranny fluid, changing the filter and refilling it, the gerking I was talking about has completley gone away!!!
So I attribute my problem to old tranny fluid (about 90k). Now the car is smooth as silk.
So I attribute my problem to old tranny fluid (about 90k). Now the car is smooth as silk.
Almost a Member!
Joined: Feb 2008
Posts: 46
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From: Michigan, West Side
2005 E320 CDI
Black,
Thank you for the reply. Interesting outcome. I will set up an appt. to do just that. My car is out of warranty so I would much rather try the tranny change, as it has to be done some time anyway, than the EGR swap and software reflash. I have been quoted about $400.00 for the EGR and software. Did you do the tranny flush yourself? Anyone else have experience with the tranny oil change and filter change? Is it difficult and how much cost is involved.
What is the original recommended tranny oil change interval? Mine has 75K on it and it hasn't been changed yet that I know of.
Thanks in advance.
Thank you for the reply. Interesting outcome. I will set up an appt. to do just that. My car is out of warranty so I would much rather try the tranny change, as it has to be done some time anyway, than the EGR swap and software reflash. I have been quoted about $400.00 for the EGR and software. Did you do the tranny flush yourself? Anyone else have experience with the tranny oil change and filter change? Is it difficult and how much cost is involved.
What is the original recommended tranny oil change interval? Mine has 75K on it and it hasn't been changed yet that I know of.
Thanks in advance.
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
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From: North Scottsdale, AZ
'71 Pinto
For the benefit of members with 722.6 transmissions (5-speed) in warranty or with extended warranty if you experience vehicle jolt at constant speeds or during gentle acceleration when the torque converter is applied, and mileage is over 40,000 mention DTB P-B-27.20/78 AUG06. The dealer with check the torque converter clutch, verify there is no glycol in the ATF, and replace ATF/filter at no cost.
Senior Member
Joined: Apr 2004
Posts: 274
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From: Georgia, USA
Honda Accord
The above link is from an earlier model, but the only differences are that the W211 with the 722.6 5-speed AT does not have the drain for the torque converter, and our fill pipe is not as easily accessible requiring a funnel with a flexible pipe to refill the fluid.
Last edited by X72; Jun 23, 2008 at 11:00 AM.
