Renntech vs. EuroCharged Tune
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From: MD/DC/VA
2012 C63 Coupe P31 OE Tuned/ROW Airbox/K&N filters/Quaife LSD/MBH LTH, Race Cats, Midpipes, Xpipes
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Joined: Oct 2019
Posts: 32
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From: Salt Lake City, Utah
2019 Toyota 4Runner (TRD Pro), 2015 Jeep Wrangler (Sahara Edition)
I am curious what you ended up finding out here too? I have been thinking about doing the RennTECH ECU tune on my 2020 C63S, but the wife would kill me if the dealership warranty is voided in any way.
I used to have the BMW PPK on my old 335i that added 40/40, which I liked and didn't void the warranty since it was offered directly by BMW. It sounds like if we can find a MB dealership to do the tune, be it RennTECH or any other tune, the MB warranty should not be voided?
I was hoping MB offered something directly like the BMW PPK, but if I can get the RennTECH tune and not void my warranty I would be exceedingly happy.
For anyone with the RennTECH tune, is there anything in the display of the car which indicates you're running the tune? The BMW PPK never displayed anything indicating it had been loaded on the car, which always concerned me. Thanks for any input.
I used to have the BMW PPK on my old 335i that added 40/40, which I liked and didn't void the warranty since it was offered directly by BMW. It sounds like if we can find a MB dealership to do the tune, be it RennTECH or any other tune, the MB warranty should not be voided?
I was hoping MB offered something directly like the BMW PPK, but if I can get the RennTECH tune and not void my warranty I would be exceedingly happy.
For anyone with the RennTECH tune, is there anything in the display of the car which indicates you're running the tune? The BMW PPK never displayed anything indicating it had been loaded on the car, which always concerned me. Thanks for any input.
Last edited by PerrinSLC; Jan 21, 2020 at 01:31 PM.
Member
Joined: Jan 2020
Posts: 198
Likes: 54
17 C63S coupe
I am curious what you ended up finding out here too? I have been thinking about doing the RennTECH ECU tune on my 2020 C63S, but the wife would kill me if the dealership warranty is voided in any way.
I used to have the BMW PPK on my old 335i that added 40/40, which I liked and didn't void the warranty since it was offered directly by BMW. It sounds like if we can find a MB dealership to do the tune, be it RennTECH or any other tune, the MB warranty should not be voided?
I was hoping MB offered something directly like the BMW PPK, but if I can get the RennTECH tune and not void my warranty I would be exceedingly happy.
For anyone with the RennTECH tune, is there anything in the display of the car which indicates you're running the tune? The BMW PPK never displayed anything indicating it had been loaded on the car, which always concerned me. Thanks for any input.
I used to have the BMW PPK on my old 335i that added 40/40, which I liked and didn't void the warranty since it was offered directly by BMW. It sounds like if we can find a MB dealership to do the tune, be it RennTECH or any other tune, the MB warranty should not be voided?
I was hoping MB offered something directly like the BMW PPK, but if I can get the RennTECH tune and not void my warranty I would be exceedingly happy.
For anyone with the RennTECH tune, is there anything in the display of the car which indicates you're running the tune? The BMW PPK never displayed anything indicating it had been loaded on the car, which always concerned me. Thanks for any input.
Thread Starter
Junior Member
Joined: Dec 2019
Posts: 36
Likes: 3
From: Dallas
C63 S
I am curious what you ended up finding out here too? I have been thinking about doing the RennTECH ECU tune on my 2020 C63S, but the wife would kill me if the dealership warranty is voided in any way.
I used to have the BMW PPK on my old 335i that added 40/40, which I liked and didn't void the warranty since it was offered directly by BMW. It sounds like if we can find a MB dealership to do the tune, be it RennTECH or any other tune, the MB warranty should not be voided?
I was hoping MB offered something directly like the BMW PPK, but if I can get the RennTECH tune and not void my warranty I would be exceedingly happy.
For anyone with the RennTECH tune, is there anything in the display of the car which indicates you're running the tune? The BMW PPK never displayed anything indicating it had been loaded on the car, which always concerned me. Thanks for any input.
I used to have the BMW PPK on my old 335i that added 40/40, which I liked and didn't void the warranty since it was offered directly by BMW. It sounds like if we can find a MB dealership to do the tune, be it RennTECH or any other tune, the MB warranty should not be voided?
I was hoping MB offered something directly like the BMW PPK, but if I can get the RennTECH tune and not void my warranty I would be exceedingly happy.
For anyone with the RennTECH tune, is there anything in the display of the car which indicates you're running the tune? The BMW PPK never displayed anything indicating it had been loaded on the car, which always concerned me. Thanks for any input.
I'd recommend you call your local dealer, and ask them about it and you should receive the same answer that I did. In short if the MB dealer installs the Renntech part, then they will continue the warranty coverage. You obviously have to pay the labor charges, but at least you can sleep easy and not be murdalized by your wife. Here is a list of the certified Renntech dealers which includes Lindon Utah. https://www.renntechmercedes.com/ind.../north-america
Super Member
Joined: Jun 2015
Posts: 643
Likes: 92
From: Houston, TX
'15 C63S
Your profile says that you are in Utah, it appears that you are in luck as your local MB dealer is also a Renntech certified dealer. If your MB dealer is a Renntech dealer it means they have an agreement with Renntech, which is what you are looking for. I called my local MB Dealer, that's also a Renntech certified dealer, and they told me if they install the Renntech parts, your factory warranty will remain unchanged. As a matter of a fact when I called they had a certified Renntech specialist that worked at the MB dealer, and handled all Renntech installs.
I'd recommend you call your local dealer, and ask them about it and you should receive the same answer that I did. In short if the MB dealer installs the Renntech part, then they will continue the warranty coverage. You obviously have to pay the labor charges, but at least you can sleep easy and not be murdalized by your wife. Here is a list of the certified Renntech dealers which includes Lindon Utah. https://www.renntechmercedes.com/ind.../north-america
I'd recommend you call your local dealer, and ask them about it and you should receive the same answer that I did. In short if the MB dealer installs the Renntech part, then they will continue the warranty coverage. You obviously have to pay the labor charges, but at least you can sleep easy and not be murdalized by your wife. Here is a list of the certified Renntech dealers which includes Lindon Utah. https://www.renntechmercedes.com/ind.../north-america
If you tune your car and it is found by the dealer's mechanic to be caused by the tune, MBUSA will not cover the repais under warranty. It is as simple as that.
You have to understand that MBUSA and your local dealership are two completely different businesses that are only related in that the dealer has a contract to sell/service MB vehicles. The dealer might do the service on your car, but it has absolutely no say in if warranty claims are approved or not. The warranty approval process is 100% decided by MBUSA and by them only. They decide what is approved and what isn't. And if there is evidence of aftermarket work that caused the failure, they will deny your claim. There is absolutely nothing your dealer can do to get around that.
What your dealer is telling you is that, either through them or through RENNtech (or both), they will take on the liability of the warranty should MBUSA deny the claim due to the tune. You'll be dealing locally with them, not MBUSA.
Nothing is inherently wrong with that, but you have to understand the fact that it does affect your MBUSA warranty.
Thread Starter
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Joined: Dec 2019
Posts: 36
Likes: 3
From: Dallas
C63 S
This has been discussed pretty much anytime people bring up factory warranties and how they are affected by tunes.
If you tune your car and it is found by the dealer's mechanic to be caused by the tune, MBUSA will not cover the repais under warranty. It is as simple as that.
You have to understand that MBUSA and your local dealership are two completely different businesses that are only related in that the dealer has a contract to sell/service MB vehicles. The dealer might do the service on your car, but it has absolutely no say in if warranty claims are approved or not. The warranty approval process is 100% decided by MBUSA and by them only. They decide what is approved and what isn't. And if there is evidence of aftermarket work that caused the failure, they will deny your claim. There is absolutely nothing your dealer can do to get around that.
What your dealer is telling you is that, either through them or through RENNtech (or both), they will take on the liability of the warranty should MBUSA deny the claim due to the tune. You'll be dealing locally with them, not MBUSA.
Nothing is inherently wrong with that, but you have to understand the fact that it does affect your MBUSA warranty.
If you tune your car and it is found by the dealer's mechanic to be caused by the tune, MBUSA will not cover the repais under warranty. It is as simple as that.
You have to understand that MBUSA and your local dealership are two completely different businesses that are only related in that the dealer has a contract to sell/service MB vehicles. The dealer might do the service on your car, but it has absolutely no say in if warranty claims are approved or not. The warranty approval process is 100% decided by MBUSA and by them only. They decide what is approved and what isn't. And if there is evidence of aftermarket work that caused the failure, they will deny your claim. There is absolutely nothing your dealer can do to get around that.
What your dealer is telling you is that, either through them or through RENNtech (or both), they will take on the liability of the warranty should MBUSA deny the claim due to the tune. You'll be dealing locally with them, not MBUSA.
Nothing is inherently wrong with that, but you have to understand the fact that it does affect your MBUSA warranty.
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Joined: Dec 2019
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From: Florida
AMG C63s
The assumption that is being made is that the local dealer will inform MBUSA of the tune, for the sake of having their claim denied by MBUSA so that they then have to take on the liability of work they would normally be reimbursed for. I'm not saying they would or wouldnt, but as we all know all of these places likely have their own policy's, especially when it comes to self reporting and losing revenue unnecessarily. In short, if the local dealer doesnt report it, then your warrant remains unchanged. To your point most people wont care who's paying for it, as long as it's not them. I wouldn't be concerned about it, unless I planned on moving away from the MB dealer that is guaranteeing coverage. If my local dealer says (in writing) i'm covered that works for me and likely most people.
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Thread Starter
Junior Member
Joined: Dec 2019
Posts: 36
Likes: 3
From: Dallas
C63 S
I think msd3036 explained it well. The dealer does not decide warranty or not. I contacted a Renntech dealer too and also talked to Renntech HQ - simple answer, best is the dealer knows as little as possible. Why for even Renntech dealers - if they would file a claim and not telling MB the car had a tune even though they installed it, they would risk loosing their MB certification and no dealer will take that risk for just you. They will offer you their piggyback warranty...but if you install it somewhere else and remove/reflash back before any service the likelihood they discover is low and in the case they do they have more leeway as they can always claim they did not know. JMO - but in any case no tune is warranted by MB but some are known to give good protection by the maker (dinan, renntech..). But this also happen to be the brands known to have the least issues.
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Joined: Jun 2015
Posts: 643
Likes: 92
From: Houston, TX
'15 C63S
Right, that's my point. If the local MB dealer will put in writing that they will cover Renntech if they do the install, that covers 99% of situations. Wether corporate or the local dealer actually pays for it is their problem, the experience to the end user is the same. I wouldn't personally care if they filed it with corporate or not, I'd just want them to cover what they guaranteed. Renntechs warranty also seems to cover MB parts and labor if the dealership doesnt cover it, but the language is pretty vague, but obviously they have a great reputation so 6 in one hand/half a dozen in the other.
With the factory warranty, your car will be fixed using new MB parts no questions ask. No haggling. No headaches. That blown transmission? It's several steps below a rounding error on MBUSA's books.
With the RENNtech/Dealer/Other Tuner warranty, you don't have that same level of security. Are they installing a new transmission, or are you getting one out of a totaled car that's been sitting in a junkyard for 6 months? Is you car getting fixed expeditiously, or are they doing it in their spare time since they aren't getting paid for the work?
I'm not saying this is going to happen, but you have to be aware of the true situation and the possible ramifications.
Last edited by msd3075; Jan 22, 2020 at 01:13 PM.
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Joined: Jul 2016
Posts: 68
Likes: 5
2020 C63s AMG Coupe
The experience on the user end isn't neccesarily the same.
With the factory warranty, your can will be fixed using new MB parts no questions ask. No haggling. No headaches. That blown transmission? It's several steps below a rounding error on MBUSA's books.
With the RENNtech/Dealer/Other Tuner warranty, you don't have that same level of security. Are they installing a new transmission, or are you getting one out of a totaled car that's been sitting in a junkyard for 6 months? Is you car getting fixed expeditiously, or are they doing it in their spare time since they aren't getting paid for the work?
I'm not saying this is going to happen, but you ha e to be aware of the true situation and the possible ramifications.
With the factory warranty, your can will be fixed using new MB parts no questions ask. No haggling. No headaches. That blown transmission? It's several steps below a rounding error on MBUSA's books.
With the RENNtech/Dealer/Other Tuner warranty, you don't have that same level of security. Are they installing a new transmission, or are you getting one out of a totaled car that's been sitting in a junkyard for 6 months? Is you car getting fixed expeditiously, or are they doing it in their spare time since they aren't getting paid for the work?
I'm not saying this is going to happen, but you ha e to be aware of the true situation and the possible ramifications.
