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Old 06-29-2021, 06:13 AM   #1
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Mercedes Approved Emission Modification (AEM) "Recall"

Just heard about the AEM recall and the class action suit. A law firm is on me to get the recall done and then I’ll be entitled to a big payout. Two questions: is this all true? If so, is the AEM “upgrade” a good idea or should I stick with the engine as it came from the factory? Thanks.
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Joe Newman
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Old 11-04-2021, 04:31 PM   #2
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Joe, I know this post is several months old, I just got my AEM notice in the mail a few weeks ago. From what I see on the internet it does seem to be true but I have not contacted my local MB to schedule mine yet (which is 90 miles away !) There is some interesting info on this site then click on the FAQ link. I here that MB dealers are covered up and it could take months to get your AEM done. Has anyone done theirs yet ?
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Old 11-04-2021, 05:00 PM   #3
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Many have got it done but right now there are big delays at dealerships nationwide due to labor and parts shortages. There is still about a year left for current owners, I am waiting so that the mechanics will be more experienced at it and hopefully till the time I have to leave it at the shop will be short. I have heard of no real issues with those that have had it done except for normal driving time to reset shift patterns etc. and I saw a couple people claimed the DEF consumption increased slightly. A few people also reported a check engine light shortly after completion but the problem was fixed by the dealer, could be an issue if your dealer is a long ways away. The only reason I can think of for the lawyers to be pushing it is for the money they themselves will receive for each claim, I don't think they are too worried about your interests.
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Old 11-04-2021, 07:01 PM   #4
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I had no idea what this was, when I searched I found a Mercedes webpage that states:

No, this is NOT a recall. As part of the settlement with the US authorities, Daimler and Mercedes-Benz USA (MBUSA) are offering eligible vehicle Owners/Lessees a modification to the vehicles’ emission control system, referred to as an Approved Emission Modification (AEM). This modification will be performed at no cost to the Owner/Lessee.
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Old 11-04-2021, 07:41 PM   #5
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The biggest advantage to getting it done is the 4 year 48,000 mile extension on the emissions system warranty. Another reason to wait as it will push the warranty out further. The check for $3,290 (or $2,468 if any previous owners put in a claim or if you started ownership after 9/14/2020) isn't too shabby either and could pay for a non emissions related repair down the road. (There is also a separate, smaller check for the Bosch settlement in the $200 range for owners)
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Old 11-04-2021, 09:02 PM   #6
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I have a friend who had the recall done and it did increase her DEF consumption vs. before the recall. Other than that no difference in performance. Hopefully it will make it go longer between repairs. She had NOX sensors go out several times on her View.
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Old 11-05-2021, 07:09 AM   #7
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On a motorhome that has a large DEF tank and doesn't get driven a lot an increase in DEF consumption is a good thing, helps keep it fresh. It's dirt cheap anyway considering how far it goes.
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