M-Class (W166) Produced 2012-2015

Bluetec engine light on

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Old 09-07-2018, 08:47 PM
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Bluetec engine light on

It’s late Friday and I’m 400 miles from home and my engine light just came on. Car is very sluggish and the trans doesn’t want to shift properly. Called Roadside assistance and they can’t do anything till morning. I have a place to stay but was wondering if anyone else has had a similar problem?
Old 09-08-2018, 07:56 AM
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Let us know what the problem was
Old 09-08-2018, 08:34 AM
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Originally Posted by peter2772000
Let us know what the problem was
I just returned from the local advance auto parts. I have a code for a diesel particulate filter. Not sure what to do now I called roadside assistance in and they want to tow it to a local dealer which is two hours away.
Old 09-08-2018, 01:25 PM
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If it isn't running in limp mode and everything seems fine, I wouldn't sweat it right away. Is the truck still under warranty? Year and mileage?

Edit, just re-read your first post. Sorry. Looks like you're gonna need to get it towed

Last edited by peter2772000; 09-08-2018 at 01:30 PM.
Old 09-08-2018, 01:45 PM
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On a flatbed, going to Winston-Salem.
Old 09-11-2018, 07:56 AM
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They say I need a new particulate filter, and they don’t have one. Asked if I could leave it for a week. I’m on my way home the way it is. They reset the code and said I should be ok, and Good Luck!
Old 09-11-2018, 09:52 AM
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Originally Posted by gkgeiger
They say I need a new particulate filter, and they don’t have one. Asked if I could leave it for a week. I’m on my way home the way it is. They reset the code and said I should be ok, and Good Luck!
There is another forum member who is waiting for DPF filter ordered in Germany for a few months already. He couldn't find a single dealer who had one in stock.
This & high monthly depreciation make me think about trade in our ML no matter how much we like it.
Good luck, and keep is updated.
Old 09-11-2018, 05:49 PM
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Originally Posted by DanD.
There is another forum member who is waiting for DPF filter ordered in Germany for a few months already. He couldn't find a single dealer who had one in stock.
This & high monthly depreciation make me think about trade in our ML no matter how much we like it.
Good luck, and keep is updated.
I hope that isn't the case with mine. The good news, I just drove 400+ miles without a problem. I plan to keep this vehicle for a long time unless there is a problem getting replacements. About your concern, as the owner of 3 MB's I have already decided I will never buy another new one, or used for that matter unless it's a screaming deal. My SL lost half it's value in a little over 2 yrs.
Old 09-11-2018, 05:53 PM
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Originally Posted by DanD.
There is another forum member who is waiting for DPF filter ordered in Germany for a few months already. He couldn't find a single dealer who had one in stock.
This & high monthly depreciation make me think about trade in our ML no matter how much we like it.
Good luck, and keep is updated.
Glade you made home and hope you can get DPF filter quick.
Speaking on depreciation, gas version drops value twice or three times slower vs diesel version, thank you VW
Old 09-11-2018, 06:17 PM
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The fact is, other than the swirl valves (EGR) getting all crudded upAlong with , the Adblue tank issues and the DPF, the OM642 seems to be a pretty good engine.

At 25k miles, we've already replaced the Adblue tank/heater assembly and the truck is at the dealer for a Mass Air Sensor as I type this.
I dunno if they do vehicle inspections in Ohio or FL, but they don't up here in Quebec. We're booked for a EGR/Adblue/DPF delete in October, along with the necessary ECM retune.
Along with high(er) zinc content oil and oil/filter changes every 3k miles, I 'm gunning to rediscover MB reliability afterwards...
Old 09-12-2018, 12:04 PM
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Originally Posted by peter2772000
The fact is, other than the swirl valves (EGR) getting all crudded upAlong with , the Adblue tank issues and the DPF, the OM642 seems to be a pretty good engine.

At 25k miles, we've already replaced the Adblue tank/heater assembly and the truck is at the dealer for a Mass Air Sensor as I type this.
I dunno if they do vehicle inspections in Ohio or FL, but they don't up here in Quebec. We're booked for a EGR/Adblue/DPF delete in October, along with the necessary ECM retune.
Along with high(er) zinc content oil and oil/filter changes every 3k miles, I 'm gunning to rediscover MB reliability afterwards...
I have 43K on my OM651 and couldn't have been happier with it, until this happened. I'll probably mile out before my 4 yrs. is up. Those 2500 mile round trips to FL. add up. It's at the local dealer now, waiting to hear their story. Currently we are licensed in OH. which has an emissions test.
Old 09-16-2018, 03:51 PM
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I just got a letter from MB Canada, due to the diesel gate, MB will extend warranty to 10 years or 193,000 km. I don't know if in the US offers same or not, don't follow that much lately on the forum. I hope yours will cover under warranty.
Old 09-16-2018, 05:44 PM
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Originally Posted by B5chung
I just got a letter from MB Canada, due to the diesel gate, MB will extend warranty to 10 years or 193,000 km. I don't know if in the US offers same or not, don't follow that much lately on the forum. I hope yours will cover under warranty.
Good for you, I hope that happens here. Right now I just want to get mine fixed. Local dealer doesn’t want to do anything
Old 09-20-2018, 11:11 AM
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Originally Posted by gkgeiger

Good for you, I hope that happens here. Right now I just want to get mine fixed. Local dealer doesn’t want to do anything
The DPF is covered under the extended emissions warranty - check your manual. If you get check engine light again with a code for DPF they have to fix it in that period. You also have some good lemon laws in the USA which may apply to you. If you go into "limp mode" again try shutting off the vehicle and restarting. That may reset limp mode and get you going. The check engine light will not go out necessarily. I have this problem all the time and I keep restarting to get out of limp mode until I can get back to the dealer.
Old 09-20-2018, 12:03 PM
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Originally Posted by marchgroupinc
The DPF is covered under the extended emissions warranty - check your manual. If you get check engine light again with a code for DPF they have to fix it in that period. You also have some good lemon laws in the USA which may apply to you. If you go into "limp mode" again try shutting off the vehicle and restarting. That may reset limp mode and get you going. The check engine light will not go out necessarily. I have this problem all the time and I keep restarting to get out of limp mode until I can get back to the dealer.
Thanks, I have another thread regarding this in the Diesel section. Nothing getting done now, hoping for the best.
Old 09-21-2018, 09:25 AM
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Originally Posted by B5chung
I just got a letter from MB Canada, due to the diesel gate, MB will extend warranty to 10 years or 193,000 km. I don't know if in the US offers same or not, don't follow that much lately on the forum. I hope yours will cover under warranty.
I have not reiieved a letter or heard of the new warranty for Canadian Blu-tec diesel owners. Can anyone share this so we can take advantage of the warranty extension in Canada?
Old 09-21-2018, 04:25 PM
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This!!!!!!!!!!!!!!!!!
Old 09-22-2018, 10:24 AM
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Originally Posted by B5chung
I just got a letter from MB Canada, due to the diesel gate, MB will extend warranty to 10 years or 193,000 km. I don't know if in the US offers same or not, don't follow that much lately on the forum. I hope yours will cover under warranty.
Are talking just emissions or entire vehicle?
Old 09-24-2018, 09:06 AM
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Originally Posted by gkgeiger
Are talking just emissions or entire vehicle?
I just read the letter and the extended warranty only covers the soot particulate sensor - nothing else is more than the standard warranty.
Old 02-25-2019, 01:46 PM
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My car has been at the dealership since 2/7/19, waiting on parts. The SA said DPF and sensors. Second time for this engine code since Sept.'18.
Old 02-25-2019, 03:24 PM
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Originally Posted by gkgeiger
My car has been at the dealership since 2/7/19, waiting on parts. The SA said DPF and sensors. Second time for this engine code since Sept.'18.
How many miles on your truck? Just curious as I'm in the same setup, and have 6 months left on the CPO warranty to figure out what I want to do with an additional one, for this very repair. Thanks
Old 02-25-2019, 08:43 PM
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Originally Posted by we47b1me
How many miles on your truck? Just curious as I'm in the same setup, and have 6 months left on the CPO warranty to figure out what I want to do with an additional one, for this very repair. Thanks
I have about 48k and my warranty expires on April 16.
Old 03-03-2019, 10:27 AM
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I picked my Ml up from the dealer on 2/28 3 weeks and $6k plus in warranty repairs. The ENGINE LIGHT came on again yesterday.
Old 03-03-2019, 12:03 PM
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My sympathies.....

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