Diesel Hesitation and Bucking
Junior Member
Joined: Nov 2011
Posts: 59
Likes: 1
iu
[QUOTE=Vancity;5118740]Ask for another bluetec loaner or demo with the update, take it for a test drive and see if the power & lag are still noticed. Mines got great jump from start no lag, I love the torque. I'm finally now giving it more throttle since I waited to for the break in period at just over 1500km.[/QUOTE
good idea, vancity. I will definitely get a demo and see if it is the same. If not and the demo is better it will be more beneficial then me trying to explain the issue.
good idea, vancity. I will definitely get a demo and see if it is the same. If not and the demo is better it will be more beneficial then me trying to explain the issue.
Newbie
Joined: Mar 2008
Posts: 13
Likes: 0
From: Long Island, NY
1991 300CE, 2013 ML350 Bluetec, 2014 ML350 Bluetec, 2012 Ram 1500
How can an update be installed wrong? A Software update seems to easy and be an all or nothing update.
Also, why would they change the operating parameters past a minute or two of warm-up unless they are trying to cover something else up? Maybe they are finding problems with all that torque limiting transmission life or even engine life.
I wouldn’t find anything they do surprising now.
Also, why would they change the operating parameters past a minute or two of warm-up unless they are trying to cover something else up? Maybe they are finding problems with all that torque limiting transmission life or even engine life.
I wouldn’t find anything they do surprising now.
Junior Member
Joined: Feb 2012
Posts: 59
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From: Vancouver BC
2012 ML350BT
A friend of mine will be taking possession of a Bluetec tomorrow, I will ask if he notices any hesitation or bucking while in cold start. When I mentioned that some people are having problems at cold start he didn’t seem deterred or bothered. Mercedes seems to be still rolling them out of production fast, there is a huge demand. The Majority of the 350’s sold in Canada are Bluetec, I believe something like 80% and regular gas & diesel prices are at par in most areas here…
Senior Member
Joined: Aug 2011
Posts: 370
Likes: 27
From: Canada
2016 GLE 350d
A friend of mine will be taking possession of a Bluetec tomorrow, I will ask if he notices any hesitation or bucking while in cold start. When I mentioned that some people are having problems at cold start he didn’t seem deterred or bothered. Mercedes seems to be still rolling them out of production fast, there is a huge demand. The Majority of the 350’s sold in Canada are Bluetec, I believe something like 80% and regular gas & diesel prices are at par in most areas here…
I would put money on a class action lawsuit in the near future if they keep selling this model with a known problem.
Junior Member
Joined: Dec 2011
Posts: 59
Likes: 0
% of Bluetecs with this problem?
It bothered me enough to quickly trade up to a 550 which is fantastic. People who say they are not bothered by it are crazy. I wouldn't put up with it and if anyone I knew was shopping for a new ML I would try to steer them towards a gas engine until the problems properly fixed, something I don't believe a software update is going to do.
I would put money on a class action lawsuit in the near future if they keep selling this model with a known problem.
I would put money on a class action lawsuit in the near future if they keep selling this model with a known problem.
All the posters her have had this problem to some degree, but how many Bluetecs are out there without this problem? I have not had any of the myriad of problems (touchwood!) described here any on other boards - hope it stays that way for me!
Junior Member
Joined: Oct 2011
Posts: 22
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From: Vancouver BC
Slk320, ML350, GLC AMG43
Question is, what is the percentage of Bluetecs with this problem?
All the posters her have had this problem to some degree, but how many Bluetecs are out there without this problem? I have not had any of the myriad of problems (touchwood!) described here any on other boards - hope it stays that way for me!
All the posters her have had this problem to some degree, but how many Bluetecs are out there without this problem? I have not had any of the myriad of problems (touchwood!) described here any on other boards - hope it stays that way for me!
MBWorld Fanatic!
Joined: Nov 2001
Posts: 5,640
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From: GMT -8 hours
Mercedes-Benz
2011 BMW 5 series has had a similar issue with a .5 to .75 second delay when accelerating from a stop (I know, I have one). Finally over a year later BMW has a software fix which completely cures this issue. Until then the dealers were denying there was a problem and could do nothing to fix it... sounds very similar to this bluetec issue. I wonder if it affects the W212?
Junior Member
Joined: Nov 2011
Posts: 59
Likes: 1
iu
I spoke with my service manager today after he spoke with MB engineering and he stated that MB has not heard of anyone with a turbo lag issue after the upgrade. scheduled another appointment to look over the car next thursday so we will see what happens.
Unfortunantly, my dealership does not have another BT on the lot to compare against.
Unfortunantly, my dealership does not have another BT on the lot to compare against.
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Thread Starter
Senior Member
Joined: Oct 2011
Posts: 357
Likes: 0
2012 ML 350 BlueTec
I spoke with my service manager today after he spoke with MB engineering and he stated that MB has not heard of anyone with a turbo lag issue after the upgrade. scheduled another appointment to look over the car next thursday so we will see what happens.
Unfortunantly, my dealership does not have another BT on the lot to compare against.
Unfortunantly, my dealership does not have another BT on the lot to compare against.
Member
Joined: Feb 2012
Posts: 106
Likes: 0
From: montreal
F250-Mustang GT-ML350BT
i have had the truck for 1 1/2 weeks now its got about 900 km./550 miles i left it outside last night weather around 32 here and it did not buck or hesitate.as a matter of a fact it never has since i got.Did i get lucky or have they fixed the issue?build date was 3 rd decade february.It ran at about 10L per 100 kms/ 23.5 miles per gallon.premiun gas is a bit more expensive here than diesel here around 20 to 30 cents a gallon, love the bt and would order again any time.
Member
Joined: Mar 2011
Posts: 81
Likes: 2
2016 GL 450
By the time I'm a block away (i.e., the engine is warming up) it's gone, and I have never considered it a defect.
I wonder if the extra power they're getting from the engine in the new ML compared to the E could be exacerbating the effect.
Thread Starter
Senior Member
Joined: Oct 2011
Posts: 357
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2012 ML 350 BlueTec
The only thing I find is that the transmission doesn't want to shift to 2nd till about 2200RPM. Seems high but only for the first 30 seconds or so then its back to normal. But all in all its OK now after the update.
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From: Lake Oswego, OR
2020 GLE 450; 2023 BMW M2 Coupe
Super Member
Joined: Mar 2011
Posts: 552
Likes: 1
From: Near Niagara Falls, Canada
2013 ML BLUETEC JULY 31
Its a planned thing to warm the engine sort like the old and still fast idle. VW similar. That's a lot of torque from a cold engine and some complainers here have never had a diesel and that much grunt on a cold morn. All things like people need mods and adjustments. That's why mullets are still around LOL
Super Member
Joined: Feb 2012
Posts: 961
Likes: 240
From: Canada
2019 E63s
Had mine for just over a week now...
It was great the first couple of days, then midweek it stumbled huge on my way to work. Was in DC this weekend, pretty warm, and it stumbled again. I have been driving diesels my entire adult career. I know what to expect in the morning, but that stumble is disconcerting...
Thread Starter
Senior Member
Joined: Oct 2011
Posts: 357
Likes: 0
2012 ML 350 BlueTec
It was great the first couple of days, then midweek it stumbled huge on my way to work. Was in DC this weekend, pretty warm, and it stumbled again. I have been driving diesels my entire adult career. I know what to expect in the morning, but that stumble is disconcerting...
Newbie
Joined: Oct 2011
Posts: 7
Likes: 0
From: Seattle
2012 ML350BT
Anyone with the turbo lag after the update get any fixes or answers? I'm taking mine in tomorrow. 
Over the phone they said 'that's how diesels are', but I don't believe it. Mine is similar to what someone else said with it hesitating and then almost jumping forward. When I'm at a stop sign and cross traffic doesn't stop, I wait until everyone is gone because I'm afraid my car won't go in time and get to their speed.
Over the phone they said 'that's how diesels are', but I don't believe it. Mine is similar to what someone else said with it hesitating and then almost jumping forward. When I'm at a stop sign and cross traffic doesn't stop, I wait until everyone is gone because I'm afraid my car won't go in time and get to their speed.
Member
Joined: Mar 2011
Posts: 81
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2016 GL 450
Semi-OT, but I noticed my E does that if I'm using cruise (the automatic one with safe-follow distance) from a stop and the car in front of me is accelerating. Shift points are all annoyingly higher than if I do it myself.
Junior Member
Joined: Nov 2011
Posts: 59
Likes: 1
iu
Anyone with the turbo lag after the update get any fixes or answers? I'm taking mine in tomorrow. Over the phone they said 'that's how diesels are', but I don't believe it. Mine is similar to what someone else said with it hesitating and then almost jumping forward. When I'm at a stop sign and cross traffic doesn't stop, I wait until everyone is gone because I'm afraid my car won't go in time and get to their speed.
Over the phone they said 'that's how diesels are', but I don't believe it. Mine is similar to what someone else said with it hesitating and then almost jumping forward. When I'm at a stop sign and cross traffic doesn't stop, I wait until everyone is gone because I'm afraid my car won't go in time and get to their speed.
