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I bought a preowned 2015 bluetec GLK 250 from my local dealership in February 2021 at 108k KMs. My check engine light came on and I had the dealership run the diagnostics after they performed my A service. They told me that my DPF filter was broken and needed to be replaced. Parts and labour quoted at around 2300 before taxes.
I did some of my own research online and found out that dpf filters will clog up if they’re not able to enter regeneration mode and trigger the sensor.
I drove 20+ minutes at 100-110/kms to and from work the day after my A service. When I went to leave for work the next morning 2 days following service, my check engine light was off. I know check engine lights come off if tests are run and passed consecutively.
My question is.. could the mechanic have made the wrong call in suggesting my Dpf filter was broken? I was quoted for around 2300$ before taxes for parts and labour. They claimed my dpf filter was was broken.
Welcome! No, your DPF is not broken; the stealership's monkeys with wrenches are usually the broken ones
Sadly, you are in Canuckistan, so there are no extended emissions warranty for you like we got in the U.S. There are a couple of threads related to the AEM approved by Mercedes for the Bluetecs, if you're interested in finding out more.
I would recommend you acquaint yourself more closely with your new-to-you Bluetec, especially by getting your own scan tool that can clear engine and emissions errors and that can also force regeneration of the DPF when needed. This will come in handy and save you many potential headaches and dollars during your ownership.
I would also recommend you find a product called LM DPF Protect (link: https://products.liqui-moly.com/dies...otector-5.html) and run a couple of cans in with your fuel, taking the car out on the highway for a good, high-speed (within reason) extended run. Diesels need to be worked hard, and these Bluetecs respond well to being pushed.
+1 on the above. I also live in the People's Republic and can offer a couple of Canuck perspectives. BTW, congrats on your GLK, it's fundamentally a great little truck with some important caveats..
I'd suggest you never, ever go to a dealership for service. This will quite possibly end in frustration and a thinner wallet. The emission systems of almost all modern diesel passenger vehicles are a nest of vipers and dealerships seem geared to "by the numbers" parts replacement with minimal analysis. Good for the dealership, not so much for the customer. If you don't want to DIY, find yourself a respected independent who specializes in Mercs (diesels preferably). You can do a search for reviews or ask this forum for recommendations near your location.
There is a Canadian class action (similar to the US one) currently crawling its way through the courts. I check periodically https://kmlaw.ca/cases/mercedes-bluetec-class-action/ but it seems to be stuck, (maybe due to Covid). The results in the US seem to be positive and hopefully we will eventually see something similar..
Liqui Moly is good stuff but can be difficult to find. Go to German Auto Parts https://germanparts.ca/?gclid=EAIaIQ...SAAEgLlXvD_BwE for an online purchase.
So far, I absolutely love my GLK! I’m 26 and this is my first “non beater” vehicle. I take very good care of the body and baby it as it were my child lol. Any other tips are always welcome
I bought the comprehensive and high tech package for a parts warranty and I believe any mechanical work done outside of the dealership would void my warranty. I hope that was not a mistake.
Any recommendations on where I can buy a proper scanner?
I think it's likely worth getting a 3rd party warranty, especially on a used luxury car that would quickly become expensive to repair. I do find it odd that there's no mention of the exhaust system components.
You should be free to take your car to any reputable shop for regular maintenance like oil changes, or even perform maintenance yourself using OEM quality parts, as long as you keep the receipts for proof. At least here in the USofA, we have the Magnusson-Moss Act that protects the customer from having his/her warranty denied just because they didn't use the dealership for service. No idea if Canadia has an equivalent.
As for scanners, there are several recommended and you can buy them from multiple sources online. I think one of the more popular ones is made my iCarSoft, I think it's MB 3.0 (see link) but there are others. There's also Foxwell NT510 or NT530, (see
) that claims to work on DPF regens. You want one that can force manual DPF regenerations if needed. Many scanners will simply read your error codes and reset them, but DPF regen is not a function on most scan tools.
I think just by being on this forum you stand a much greater chance at enjoying life with your Bluetec, rather than being a passive uninformed Mercedes owner whose jaw drops to the floor at every stealership visit and then sours on the brand entirely. Don't be that individual
FWIW, at 115k kms your Bluetec is still a baby. The same engine in our GLKs are powering thousands of Sprinter vans around the continent, some with well over 500k MILES on them. Take care of it and it will take care of you.
Last edited by andreigbs; Oct 18, 2021 at 04:06 PM.
Emissions should be covered up to 6 years, I had mine replaced for free but it was +2300CAD bill, zero paidTry Durham mb near Oshawa if you near GTA Ontario
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