Mileage or time on B1 Service
I've put 9K miles on the car in the past 14 months. Dealer wants $530 for the service and says if I do it somewhere else (Indy) I can lose my warranty.
Seems like a super high price for items which are not very complicated.
What leads on these services - amount of time (1 year, 2 year etc . . .) or mileage? I average about 10K miles per year I expect.
And is it true I will lose my warranty if I have someone else do the work?
Opinions and facts are appreciated. First computer on wheels I've ever owned. LOL

A and B service is typically either mileage or time, every 10k or every year whichever is first. At least you're doing about 10k a year, I feel bad for the ones who go in for service with just 5k/year.




As far as time goes, I came up on my second B service in a year last week. I opted not to flush the brake fluid as it wasn't even 9 months old, since I did it on the last B service back in, I think, July.
You are putting so few miles on your car, mileage won't matter but things like fluids and rubber still break down over time - I think the recommended interval is at least yearly - so year 1 do an A, year 2 do a B, year 3 the next A, etc etc. Someone might correct me on that.
God, I wish I had that luxury...






1. Under Magnusson-Moss, the burden of proof falls upon the DEALER to PROVE that an outside service or aftermarket modification CAUSED the defect you are trying to claim under warranty.
2. They CANNOT deny a warranty claim simply based on the fact that service was not performed at a dealership.
So let's say you put an aftermarket exhaust on your car. A cat-back. The dealer cannot deny a warranty claim on your radiator because it has nothing to do with the exhaust. They MIGHT be able to deny a warranty claim on your catalytic converters, or oxygen sensors, but THEY need to be the ones to prove that, for instance, during the installation they accidentally cut a hole in the cat or an O2 sensor wire got burned due to the routing of the aftermarket exhaust.
Similarly, you do not need to take your car to the dealer for oil changes. If they deny your claim for taking it to Jiffy Lube, the dealer (not you) needs to send the oil out for analysis to prove that Jiffy Lube filled the car with the wrong oil, and they also need to prove that that incorrect oil caused the failure you are trying to get repaired under warranty.
What I am not sure about is if the dealer retains the right to simply refuse service to someone. It would be in poor taste and not a good business practice, however, I do think they might be able to simply opt not to work on your car and justify it some goofy way, like "your aftermarket exhaust installation presents a safety issue for our mechanics" or something equally ridiculous. I can't even think of what the justification would be for a normal service done elsewhere, so I had to jump back to the aftermarket exhaust example. One tactic I have heard of, is dealers might refuse to work on a car if the job they have to do involves working on the aftermarket parts. Again I can't conceive of a situation this would arise involving independent service, so I have to default to aftermarket parts: they could, for instance, refuse to replace your transmission, if doing that job involves removing the aftermarket exhaust you installed. I've heard of them saying "our mechanics have established procedures for every job, but we have no established procedures for XYZ so we can't touch it". They might insist you reinstall the factory exhaust, then they will do your transmission. It's crappy but I think that could be a loophole. To reiterate, I can't even conceive of a situation where this could apply to just having an independent service done.
Now, don't go printing this out and running to the dealer waving it yelling "this dude on the interwebs says this about you and you have to do what he says!!!". However, this is the Campbell's condensed soup version of Magnusson-Moss and you CAN go and print M-M and take it in to the dealer and show him that, if they give you enough trouble.
I've never run into any issues, knock on wood. I had a Jeep I bought brand new and ridiculously modified while still under warranty. Never had an argument for any reasonable request. Also see my example above about doing my own services, and still getting my engine rebuilt under warranty. Some businesses are better than others, and maybe I've been lucky. There's always MB N-A to appeal to if your dealer gives you a real headache.


The manufacturer sets the terms of the warranty and restricts warranty repairs to authorized repair stations which are their franchised dealers. They have the right to set the standards required to keep the warranty applicable. The reason behind Magnusson-Moss was to protect the consumer against unreasonable warranty conditions and charges. The problem though is that it is interpreted and taken into account in their policy and procedures as it cannot possibly foresee all possible circumstances. If the manufacturer decides to deny warranty coverage because of insufficient proof of properly done maintenance or the use of improper parts, the burden of proof lies with the consumer, not the manufacturer.
I started in this thread to simply state a caution for owners to be careful with their maintenance choices done outside the dealer network. Most all of us in the industry have seen problems arise in this area. I must say that in over forty years of owning and operating new car dealerships, I have never seen a customer win a case litigating the Magnusson-Moss act as their source of complaint.
Trending Topics




Stupid Ox sensor cost 4-digits at dealer as the result.
So here is the page where you can vote your voice on the issue https://repair.org/stand-up/
The Best of Mercedes & AMG


