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There’s no disagreement here—it all comes down to what each person is willing to do and risk.
For skilled DIYers who can source the necessary materials, tackling this service can be both rewarding and cost-effective.
Independent shops are a good alternative for non-DIY owners looking to save money, but finding one with real experience handling this DCT can be challenging. Many claim they can do it, but without reviewing the WIS documents, it often ends up being their first attempt—which can be concerning.
While DCT transaxles are generally reliable and unlikely to fail for most owners, opting for DIY or an independent shop carries a $15K-$25K risk for those with an extended warranty, as insurance companies may deny coverage.
Having the service done at a certified dealer provides peace of mind for most owners. And at CAN$1,300, it's a great deal compared to a typical USA $1,800.
At the end of the day, whether you choose DIY, an independent shop, or a dealer, it’s all about personal preference.
This exactly! And it's why I'm taking mine to a dealer for the service instead of DIY, even though we do all our own maintenance. IF something were to go wrong, good luck getting your warranty to cover it.
Was curious what the dealer I bought the car from would say so spoke to them. They CPO’d it and said the transaxle service was discretionary as per their Star Warranty guidelines so they then deemed it not necessary given the low mileage.
i wonder if they would say the same if someone came in for a warranty repair and told them that but anyways all good because im going to my local dealer tomorrow to get both the trans and diff serviced.
Was curious what the dealer I bought the car from would say so spoke to them. They CPO’d it and said the transaxle service was discretionary as per their Star Warranty guidelines so they then deemed it not necessary given the low mileage.
Of course the Stealership claimed "discretionary" service - what a bunch of F* BS.
If you have time and are keen on it: would perhaps consider checking with MBUSA support themselves, and thoroughly review CPO Contract provisions, as a CPO Vehicle should have ALL Services performed as part of CPO spec, IIRC.
The Transaxle Service is one of the most crucial services required, FFS lol
Sorry you had to be the recipient of this nonsense.
Of course the Stealership claimed "discretionary" service - what a bunch of F* BS.
If you have time and are keen on it: would perhaps consider checking with MBUSA support themselves, and thoroughly review CPO Contract provisions, as a CPO Vehicle should have ALL Services performed as part of CPO spec, IIRC.
The Transaxle Service is one of the most crucial services required, FFS lol
Sorry you had to be the recipient of this nonsense.
I
your new dealer should be able to do this service and get reimbursed by MBUSA if a service due was not done, for a car that had a 3 years prepaid contract by a previous owner. If there was no Prepaid service in the past, as MBNRG stated, check the CPO contract. It makes sense that all scheduled services has to be done prior to CPO delivery. In your case, all services based on 5 years, which also include new spark plugs.
Of course the Stealership claimed "discretionary" service - what a bunch of F* BS.
If you have time and are keen on it: would perhaps consider checking with MBUSA support themselves, and thoroughly review CPO Contract provisions, as a CPO Vehicle should have ALL Services performed as part of CPO spec, IIRC.
The Transaxle Service is one of the most crucial services required, FFS lol
Sorry you had to be the recipient of this nonsense.
I
Originally Posted by G. P
your new dealer should be able to do this service and get reimbursed by MBUSA if a service due was not done, for a car that had a 3 years prepaid contract by a previous owner. If there was no Prepaid service in the past, as MBNRG stated, check the CPO contract. It makes sense that all scheduled services has to be done prior to CPO delivery. In your case, all services based on 5 years, which also include new spark plugs.
Started up the car today after a couple of days in sub zero temps to go to the dealer and car gave a random transmission error saying reverse gear not available and car was skipping even numbered gears but no cel. Turned it off and on and it went back to normal.
dealer said cars can act weird in cold sometimes but didnt find any codes but said tech will look in to it after performing the service as they had to order the seals.
i always have bad luck it seems in the beginning with amgs. Previously on the c63s the diff gave out on me soon after i bought it but luckily had warranty which i have on the gtr too so lets see if the tech is able to determine root cause.
oddly even my local dealer was like yeah these services can be discretionary given the low mileage. Also called MB Canada who told me to speak to dealer I bought it from and if they dont do anything then theyll escalate to some arbitration team they have.
Started up the car today after a couple of days in sub zero temps to go to the dealer and car gave a random transmission error saying reverse gear not available and car was skipping even numbered gears but no cel. Turned it off and on and it went back to normal.
dealer said cars can act weird in cold sometimes but didnt find any codes but said tech will look in to it after performing the service as they had to order the seals.
i always have bad luck it seems in the beginning with amgs. Previously on the c63s the diff gave out on me soon after i bought it but luckily had warranty which i have on the gtr too so lets see if the tech is able to determine root cause.
oddly even my local dealer was like yeah these services can be discretionary given the low mileage. Also called MB Canada who told me to speak to dealer I bought it from and if they dont do anything then theyll escalate to some arbitration team they have.
It is my experience that electrical gremlins surface in cold temps and with the car battery in less than optimal conditions (charge, voltage, etc.). There is also having the car in the proper condition for start up - here is what I mean: I could almost duplicate a startup issue that disabled traction control on my 2018 GTR if I was very gentle on the brake application on startup. A recycling of the starting procedure and firm application of the brake eliminated this problem 100% of the time.
I find that it is best practice to plug in the car with battery chemistry specific chargers when one is done driving for the day. Not saying I always do it, just saying it might be best practice.
Taking my car in for service A1 which should just be oil change and brake flush. In doing so, I checked my transaxle service invoice but noticed my receipt for the transaxle service where i believe the service rep referred to differential as the transfer case but i thought transfer case wouldnt apply to a rwd car?
will someone be able to confirm that the service performed was indeed correct? Thanks!
Taking my car in for service A1 which should just be oil change and brake flush. In doing so, I checked my transaxle service invoice but noticed my receipt for the transaxle service where i believe the service rep referred to differential as the transfer case but i thought transfer case wouldnt apply to a rwd car?
will someone be able to confirm that the service performed was indeed correct? Thanks!
The receipt clearly states that both transmission side fluid 001-989-86-03, and differential side fluid 001-989-87-03 were changes (including the screw plugs). It seems that the service was done.
Purchased a '16 GTS this week from Indianapolis. If anyone is in the Indy area and looking for an indy shop, Reggie's Motorworks in Noblesville has been fantastic to work with, and very reasonably priced in my opinion. 30k Service A ($283), brake fluid flush ($186), and transaxle/diff service ($933) for $1,402 + tax.
Last edited by RichardCranium3; Apr 9, 2025 at 10:00 AM.
I'm looking at a CPO 2024 55 AMG-GT 2 dr with 1700 miles. The dealer has replaced the battery(allegedly), changed the oil and put nitrogen in the tires
Given the age and the mileage, should the transmission service and brake fluid have been changed before delivery? Should I ask them to throw in a service plan? Where can I find the owners/maintenance manual online?
I'm looking at a CPO 2024 55 AMG-GT 2 dr with 1700 miles. The dealer has replaced the battery(allegedly), changed the oil and put nitrogen in the tires
Given the age and the mileage, should the transmission service and brake fluid have been changed before delivery? Should I ask them to throw in a service plan? Where can I find the owners/maintenance manual online?
You wait until you do it yourself. God save you if you mix up which oil goes where, yes it’s been done by experienced techs and that can be a $30K mistake. Fletcher Jones in Newport Beach just replaced the transaxle because an independent shop mixed up the oils.
Can you confirm that for the C190 platform, Service A is essentially an engine oil and filter change, while Service B is a change of the two oils in the dual-clutch transmission?
(This discussion is too valuable to be lumped in with all the others; it deserves to be pinned!)
Last edited by Kevin#34; Nov 27, 2025 at 04:55 PM.
Reason: mispelling
Can you confirm that for the C190 platform, Service A is essentially an engine oil and filter change, while Service B is a change of the two oils in the dual-clutch transmission?
(This discussion is too valuable to be lumped in with all the others; it deserves to be pinned!)
Service A and B, alternates every 10K miles. Transaxle fluid service happens every 30K miles. See tables below:
This is for ALL AMG Models (Blue dot is for MY 2009-2014)
For our AMG models Transaxle fluid change and Engine air filter - Every 30K Miles
Service A and B, alternates every 10K miles. Transaxle fluid service happens every 30K miles. See tables below:
This is for ALL AMG Models (Blue dot is for MY 2009-2014)
For our AMG models Transaxle fluid change and Engine air filter - Every 30K Miles
curious about spark plugs - i recall the dealer saying in the summer that i should get my spark plugs changed as its reccommended every 3 years or 80k km. However I chose not to because changing spark plugs at 16000 km was a bit much imo.
looking at your screenshot above, looks like the recommended mileage is the same but doesnt look like its being recommended every 3 years? Thanks
Last edited by untamedd; Nov 28, 2025 at 03:28 AM.
Thanks!
If I understand correctly, Service A is required at every 10k, 30k, 50k and so on, while Service B is required at every 20k, 40k, 60k... right?
Originally Posted by G. P
Service A and B, alternates every 10K miles. Transaxle fluid service happens every 30K miles. See tables below: This is for ALL AMG Models (Blue dot is for MY 2009-2014) For our AMG models Transaxle fluid change and Engine air filter - Every 30K Miles
curious about spark plugs - i recall the dealer saying in the summer that i should get my spark plugs changed as its reccommended every 3 years or 80k km. However I chose not to because changing spark plugs at 16000 km was a bit much imo.
looking at your screenshot above, looks like the recommended mileage is the same but doesnt look like its being recommended every 3 years? Thanks
The short answer: There is absolutely no need to replace these spark plugs every 3 years.
The proper service interval is 50,000 miles / 80,000 km or 7–10 years, depending on operating conditions.
Here’s the technical breakdown:
The spark plugs used across the 2015–2025 AMG GT lineup are Mercedes P/N A000-159-05-00, manufactured by NGK Japan as model SILZKFR8F7S (NGK 97566). These are premium long-life plugs utilizing an Iridium fine-wire center electrode, which provides:
- Extremely high resistance to erosion
- Higher melting point than conventional metals
- A cleaner, more stable spark at high RPM
- Strong ignition performance under boosted cylinder pressures
Because Iridium is exceptionally durable, these plugs can achieve well over 100,000 miles (160,000 km) in clean-running engines, provided you use quality fuel (e.g. 91+ octane, no MMT additives, no GT260Plus race fuel), the engine does not consume oil, and all combustion parameters remain within spec.
Mercedes-Benz publishes a conservative interval 50,000 miles / 80,000 km because they must account for a wide range of fuel qualities, driving conditions, and owner habits.
For a well-maintained AMG GT running proper fuel, there is no technical requirement to replace plugs earlier than 7 years, and in many cases they remain healthy for up to 10 years.
In practice, if you notice hesitation, misfires, reduced performance, or rough idle, it’s appropriate to inspect both spark plugs and ignition coils, along with other potential sources.
But in the absence of symptoms, the correct replacement interval remains 50k miles / 80k km or at least 7 years, not every 3 years.
Thanks!
If I understand correctly, Service A is required at every 10k, 30k, 50k and so on, while Service B is required at every 20k, 40k, 60k... right?
For those who track their GTs:
It’s recommended to change the engine oil and filter every 5,000 miles (8,000 km).
That means adding an extra oil/filter service between A → B and another between B → A to ensure proper protection under track conditions.
AMG GT and GT-S Service procedures per the factory Service Booklet
I have summarized all of the service procedures requiring parts replacement from the Mercedes factory Service booklet specific to the AMG GT and GT-S. I did not include all the inspections of parts and systems indicated for service A & B.
There have been multiple service intervals given here for the 190 series car, but these are from the factory documentation which was current for my 2016 GT-S.
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