RENNtech Chip Upgrade...
Thread Starter
MBWorld Fanatic!
Joined: Apr 2016
Posts: 1,493
Likes: 254
2014 S550 AMG, 2017 XT5
RENNtech Chip Upgrade...
Anyone perform an upgrade to a stock 2014+ S550? Interested in possibly adding this upgrade.
http://www.renntechmercedes.com/inde...22-s550-detail
or
http://www.renntechmercedes.com/inde...22-s550-detail
Any feedback would be appreciated good or bad.
Thanks!
http://www.renntechmercedes.com/inde...22-s550-detail
or
http://www.renntechmercedes.com/inde...22-s550-detail
Any feedback would be appreciated good or bad.
Thanks!
MBWorld Fanatic!
Joined: Oct 2010
Posts: 8,139
Likes: 4,361
From: Corona Del Mar, CA
2019 SL450, 2019 E450 Luxury Trim Wagon, 2024 BMW I7 xDrive60
"Our proprietary ECU upgrade for the Mercedes M278 Biturbo engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability."
I can just see somebody with this "upgrade," wondering WHY the dealer and MBUSA are denying their warranty claim. They say that you won't be "sacrificing around town comfort," but WHAT ABOUT THE FACTORY WARRANTY???
My 2015 S550 is SOOOOOOO FRIGGING FAST, I just can't imagine wanting more power in a luxo sedan. And this is from someone who used to race 427 Corvettes at Lyons Drag Strip in the 1970's!
Forget the "upgrade." If you want more power, get an S63. It's a ridiculous car, but then, some folks need ridiculous cars.
I can just see somebody with this "upgrade," wondering WHY the dealer and MBUSA are denying their warranty claim. They say that you won't be "sacrificing around town comfort," but WHAT ABOUT THE FACTORY WARRANTY???
My 2015 S550 is SOOOOOOO FRIGGING FAST, I just can't imagine wanting more power in a luxo sedan. And this is from someone who used to race 427 Corvettes at Lyons Drag Strip in the 1970's!
Forget the "upgrade." If you want more power, get an S63. It's a ridiculous car, but then, some folks need ridiculous cars.
Last edited by Streamliner; Aug 29, 2016 at 10:45 AM.
Super Member
Joined: Apr 2013
Posts: 706
Likes: 50
From: Scottsdale, AZ
2018 S 650, 2014 SL 550, 2017 911 TTS Cab, '13 F458 Spider
"Our proprietary ECU upgrade for the Mercedes M278 Biturbo engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability."
I can just see somebody with this "upgrade," wondering WHY the dealer and MBUSA are denying their warranty claim. They say that you won't be "sacrificing around town comfort," but WHAT ABOUT THE FACTORY WARRANTY???
My 2015 S550 is SOOOOOOO FRIGGING FAST, I just can't imagine wanting more power in a luxo sedan. And this is from someone who used to race 427 Corvettes at Lyons Drag Strip in the 1970's!
Forget the "upgrade." If you want more power, get an S63. It's a ridiculous car, but then, some folks need ridiculous cars, to make up for appendages which are lacking.
I can just see somebody with this "upgrade," wondering WHY the dealer and MBUSA are denying their warranty claim. They say that you won't be "sacrificing around town comfort," but WHAT ABOUT THE FACTORY WARRANTY???
My 2015 S550 is SOOOOOOO FRIGGING FAST, I just can't imagine wanting more power in a luxo sedan. And this is from someone who used to race 427 Corvettes at Lyons Drag Strip in the 1970's!
Forget the "upgrade." If you want more power, get an S63. It's a ridiculous car, but then, some folks need ridiculous cars, to make up for appendages which are lacking.
I personally would never put a MB warranty in jeopardy, these cars are crazy expensive to repair, in fact I would never own a MB without warranty. They also depreciate like a rock after the warranty runs out because they are so expensive to fix
I realize there are many people that are willing to gamble with aftermarket upgrades, some of which are very tempting, but in the end they are too risky for my comfort zone
Last edited by Steinhart; Aug 28, 2016 at 10:49 PM.
Thread Starter
MBWorld Fanatic!
Joined: Apr 2016
Posts: 1,493
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2014 S550 AMG, 2017 XT5
Thanks for the feedback.... The owner of the company actually still works for MB, he specialized on the AMG's. Supposedly they have a great relationship with MB till this day...
I agree with the warrantee, I received with car CPO still under B2B, and went ahead and purchased the additional 2 years for around $4.100- So I have a 7 year Unlimited Millage warrantee...
I agree with the warrantee, I received with car CPO still under B2B, and went ahead and purchased the additional 2 years for around $4.100- So I have a 7 year Unlimited Millage warrantee...
Super Member
Joined: Apr 2013
Posts: 706
Likes: 50
From: Scottsdale, AZ
2018 S 650, 2014 SL 550, 2017 911 TTS Cab, '13 F458 Spider
Thanks for the feedback.... The owner of the company actually still works for MB, he specialized on the AMG's. Supposedly they have a great relationship with MB till this day...
I agree with the warrantee, I received with car CPO still under B2B, and went ahead and purchased the additional 2 years for around $4.100- So I have a 7 year Unlimited Millage warrantee...
I agree with the warrantee, I received with car CPO still under B2B, and went ahead and purchased the additional 2 years for around $4.100- So I have a 7 year Unlimited Millage warrantee...
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Thread Starter
MBWorld Fanatic!
Joined: Apr 2016
Posts: 1,493
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2014 S550 AMG, 2017 XT5
Just keeping anyone who is interested updated. I was contacted by RENNtech, who provided me with a local dealer that does the upgraded in house. Turns out the person they referred me to is my Service Rep. at my local Mercedes Dealer. They actually do the Upgrade (Removal / Update / Re-install ) within 2 to 3 days. Warrantee intact...
Rockville Center Mercedes Benz NY in case anyone in interested.
They have a New update being released that will give you the same power as a stock 63. There are no other mods needed.
Just passing on information... I will be meeting with my Service Rep. when they receive the latest Map Updates and will inquire further.
The fact that the upgrade / install will be completed by a Mercedes Dealer instills confidence in the product.
Rockville Center Mercedes Benz NY in case anyone in interested.
They have a New update being released that will give you the same power as a stock 63. There are no other mods needed.
Just passing on information... I will be meeting with my Service Rep. when they receive the latest Map Updates and will inquire further.
The fact that the upgrade / install will be completed by a Mercedes Dealer instills confidence in the product.
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Super Member
Joined: Jan 2007
Posts: 766
Likes: 47
S, GL
If/when the warranty is denied, it comes from corporate not your dealer
So your dealer can only work with you so much - if you blow an engine, your dealer will not risk their relationship with corporate by lying to them - they will declare the mods, corporate will void, and your dealer will say we tried as hard as we could
So your dealer can only work with you so much - if you blow an engine, your dealer will not risk their relationship with corporate by lying to them - they will declare the mods, corporate will void, and your dealer will say we tried as hard as we could
Thread Starter
MBWorld Fanatic!
Joined: Apr 2016
Posts: 1,493
Likes: 254
2014 S550 AMG, 2017 XT5
If/when the warranty is denied, it comes from corporate not your dealer
So your dealer can only work with you so much - if you blow an engine, your dealer will not risk their relationship with corporate by lying to them - they will declare the mods, corporate will void, and your dealer will say we tried as hard as we could
So your dealer can only work with you so much - if you blow an engine, your dealer will not risk their relationship with corporate by lying to them - they will declare the mods, corporate will void, and your dealer will say we tried as hard as we could
Senior Member
Joined: Dec 2014
Posts: 319
Likes: 52
2014 S550, 2019 GTC Coupe
Super Member
Joined: Apr 2013
Posts: 706
Likes: 50
From: Scottsdale, AZ
2018 S 650, 2014 SL 550, 2017 911 TTS Cab, '13 F458 Spider
If/when the warranty is denied, it comes from corporate not your dealer
So your dealer can only work with you so much - if you blow an engine, your dealer will not risk their relationship with corporate by lying to them - they will declare the mods, corporate will void, and your dealer will say we tried as hard as we could
So your dealer can only work with you so much - if you blow an engine, your dealer will not risk their relationship with corporate by lying to them - they will declare the mods, corporate will void, and your dealer will say we tried as hard as we could
Senior Member
Joined: Dec 2014
Posts: 319
Likes: 52
2014 S550, 2019 GTC Coupe
This is absolutely true. MB Corporate makes the decision, not the dealer. To make matters worse, should any warranty work be needed that can possibly be connected to the mod, they will quickly deny warranty and ask you to pay in full. Yes, you can then fight their decision but legal fees are not cheap either.
Super Member
Joined: Jan 2007
Posts: 766
Likes: 47
S, GL
This is absolutely true. MB Corporate makes the decision, not the dealer. To make matters worse, should any warranty work be needed that can possibly be connected to the mod, they will quickly deny warranty and ask you to pay in full. Yes, you can then fight their decision but legal fees are not cheap either.
I have a friend who paid his installer/dealer extra $$$ to warranty all work, but he also spent almost 25K in upgrades.
