Those with Tunes Be Careful...My Story with MB
Newbie
Joined: Jun 2019
Posts: 3
Likes: 0
S550
That's music to my ears. They're not going to send my ECU to Germany unless I blow the motor, transmission or do some other major damage. If my car isn't going to be flagged for status 8 on a regular service visit, I'm happy.
Newbie
Joined: Jun 2018
Posts: 5
Likes: 1
CLS550 but aiming for AMG GT
Depends on the dealer....
I think it all depends on the dealer and your service guy. In 2014 I had my 2012 CLS550 tuned by RENNTECH by my MB dealer, so I actually had them purchase the tune, swap out the plugs and provide me with a bill on their letterhead. All the service guys knew it was tuned so they ignored it when work was done.
I now have a 2016 E63 AMGs, and last week spoke to the SAME guy who runs service, and he said MB is now getting good at catching onto tunes, and even though the new RENNtech tune has a file for the upgraded tune and the stock tune so you can switch back and forth, they can still detect it - so if anything major happened there’s a chance my extended warranty could be void.
He’s a great guy, and once I replied that I may not get the tune his response was “I once had one on my E63 and it was amazing, very tempting”, I noticed he didn’t offer to purchase it on my behalf. I assume maybe he’s gotten in trouble or something.
Anyway; going in for service next week so will sit and talk to him. If he’ll again put it on an invoice for me I’ll do it, if not, I can’t afford a new motor if anything happens, so I won’t do it.
I now have a 2016 E63 AMGs, and last week spoke to the SAME guy who runs service, and he said MB is now getting good at catching onto tunes, and even though the new RENNtech tune has a file for the upgraded tune and the stock tune so you can switch back and forth, they can still detect it - so if anything major happened there’s a chance my extended warranty could be void.
He’s a great guy, and once I replied that I may not get the tune his response was “I once had one on my E63 and it was amazing, very tempting”, I noticed he didn’t offer to purchase it on my behalf. I assume maybe he’s gotten in trouble or something.
Anyway; going in for service next week so will sit and talk to him. If he’ll again put it on an invoice for me I’ll do it, if not, I can’t afford a new motor if anything happens, so I won’t do it.
fwiw, my car is tuned and dealer knows and they dont care, they even sent my ecu back to renntech once to have them retune my ecu after they reverted it back to stock to see if a problem was tune related, and I have CPO warranty and they still honored the warranty at least 4 times now
technically its illegal (Magnuson-Moss Warranty Act) for dealer to deny your warranty unless they can prove the tune is what caused the problem.... so if you are getting your pano roof replaced under warranty its pretty hard for dealer to say your sunroof is broke because your car is tuned
technically its illegal (Magnuson-Moss Warranty Act) for dealer to deny your warranty unless they can prove the tune is what caused the problem.... so if you are getting your pano roof replaced under warranty its pretty hard for dealer to say your sunroof is broke because your car is tuned
