Does the Renntech ECU Upgrade on the S65 increase the cost of maintenance?
Thread Starter
Newbie
Joined: Jul 2012
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S65
Does the Renntech ECU Upgrade on the S65 increase the cost of maintenance?
Attention fellow MBZ Owners:
I'm thinking of purchasing a 2008 S65 with the Renntech ECU Upgrade. Can anyone tell me if the upgrades increase the cost of maintenance for the vehicle? Will it increase the cost of brake repairs or scheduled engine services?
Also, do the upgrades reduce the vehicle's gas mileage below the stated 11/17 mpg?
Thank you for your input.
Mvwright
I'm thinking of purchasing a 2008 S65 with the Renntech ECU Upgrade. Can anyone tell me if the upgrades increase the cost of maintenance for the vehicle? Will it increase the cost of brake repairs or scheduled engine services?
Also, do the upgrades reduce the vehicle's gas mileage below the stated 11/17 mpg?
Thank you for your input.
Mvwright
Senior Member
Joined: Apr 2011
Posts: 414
Likes: 1
From: Grand Rapids, MI
S55 AMG
Attention fellow MBZ Owners:
I'm thinking of purchasing a 2008 S65 with the Renntech ECU Upgrade. Can anyone tell me if the upgrades increase the cost of maintenance for the vehicle? Will it increase the cost of brake repairs or scheduled engine services?
Also, do the upgrades reduce the vehicle's gas mileage below the stated 11/17 mpg?
Thank you for your input.
Mvwright
I'm thinking of purchasing a 2008 S65 with the Renntech ECU Upgrade. Can anyone tell me if the upgrades increase the cost of maintenance for the vehicle? Will it increase the cost of brake repairs or scheduled engine services?
Also, do the upgrades reduce the vehicle's gas mileage below the stated 11/17 mpg?
Thank you for your input.
Mvwright
I think you should go for it, just one thing on this matter. Renntch is exspensive, look at other companys too. OE Tuning, Euro Charged, and Speedriven are a couple I can think of.
Thread Starter
Newbie
Joined: Jul 2012
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S65
Helpful Information
Triman2008, I appreciate the information.
The S65 I'm looking at already has the Renntech upgrades, so it's not an issue as to shopping for the most cost effective.
As to the gas mileage, are you saying the Renntech ECU Upgrade will actually increase the miles per gallon?
Thank you,
Mvwright
The S65 I'm looking at already has the Renntech upgrades, so it's not an issue as to shopping for the most cost effective.
As to the gas mileage, are you saying the Renntech ECU Upgrade will actually increase the miles per gallon?
Thank you,
Mvwright
Senior Member
Joined: Apr 2011
Posts: 414
Likes: 1
From: Grand Rapids, MI
S55 AMG
I know my car has a Kleemann box tune. On the highway I get almost 25 mpg. My car is rated at about 22 mpg. So yeah, it will help. You have to remember that with all modifications done to a car, it either help get air in or out or more fuel in. With putting more air in, you are increasing the atomization of fuel (within reason) and the burn of the fuel will be faster and more efficient. Thus uping MPG.
Thread Starter
Newbie
Joined: Jul 2012
Posts: 4
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S65
Thanks for the information and explanation of how the ECU upgrade can possibly help increase the vehicle's mpg.
Do you find the maintenance and scheduled services cost more than the regular S550 model?
Thank you,
Mvwright
Do you find the maintenance and scheduled services cost more than the regular S550 model?
Thank you,
Mvwright
MBWorld Fanatic!
Joined: Nov 2010
Posts: 2,605
Likes: 343
From: Welwyn, Herts, UK
2006 S600
Attention fellow MBZ Owners:
I'm thinking of purchasing a 2008 S65 with the Renntech ECU Upgrade. Can anyone tell me if the upgrades increase the cost of maintenance for the vehicle? Will it increase the cost of brake repairs or scheduled engine services?
Also, do the upgrades reduce the vehicle's gas mileage below the stated 11/17 mpg?
Thank you for your input.
Mvwright
I'm thinking of purchasing a 2008 S65 with the Renntech ECU Upgrade. Can anyone tell me if the upgrades increase the cost of maintenance for the vehicle? Will it increase the cost of brake repairs or scheduled engine services?
Also, do the upgrades reduce the vehicle's gas mileage below the stated 11/17 mpg?
Thank you for your input.
Mvwright
You're starting off with an expensive car whose sole purpose is to turn fuel, rubber and brakes into atmospheric pollutants as fast as possible.
Then you modify it to make it do everything faster.
And because there was no room to fit any more power-producing hardware, you have to remove the engine to change simple things.
It ain't going to be cheap.
Having said that, I found tyres, brakes, servicing and insurance costs on my S600TT to be surprisingly acceptable. Fuel and repairs are another matter.
Eyes open!
Nick
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Joined: Jun 2007
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From: The Jersey Shore
Garage Temporarily Empty
I think if you're considering purchasing a 2008 S65 with the Renntech Upgrade, cost of ownership shouldn't be a consideration.
You're starting off with an expensive car whose sole purpose is to turn fuel, rubber and brakes into atmospheric pollutants as fast as possible.
Then you modify it to make it do everything faster.
And because there was no room to fit any more power-producing hardware, you have to remove the engine to change simple things.
It ain't going to be cheap.
Having said that, I found tyres, brakes, servicing and insurance costs on my S600TT to be surprisingly acceptable. Fuel and repairs are another matter.
Eyes open!
Nick
You're starting off with an expensive car whose sole purpose is to turn fuel, rubber and brakes into atmospheric pollutants as fast as possible.
Then you modify it to make it do everything faster.
And because there was no room to fit any more power-producing hardware, you have to remove the engine to change simple things.
It ain't going to be cheap.
Having said that, I found tyres, brakes, servicing and insurance costs on my S600TT to be surprisingly acceptable. Fuel and repairs are another matter.
Eyes open!
Nick
Well said....
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Super Member
Joined: Mar 2005
Posts: 763
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From: Maryland
07 S65
I have an 07 S65 with the Renntech ECU/TCU upgrade and I haven't seen any increase in maintenance over stock. The car drives and acts just as it would stock. You have to remember it was a 200k car new so any repairs are not going to be cheap but the mods shouldn't effect it either way. I love my Renntech and wouldn't drive the car without it.
Thread Starter
Newbie
Joined: Jul 2012
Posts: 4
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S65
I appreciate all of your comments. I understand that buying a S65 is not an inexpensive choice, but I was uncertain if the Renntech upgrades actually added to the maintenance cost of the vehicle or if it lowered the mpg.
To DJE55, I looked at your S65 in your album and it is very similar to the car I am considering. Your input was greatly appreciated.
Thank you all. I appreciate any additional input.
Mvwright
To DJE55, I looked at your S65 in your album and it is very similar to the car I am considering. Your input was greatly appreciated.
Thank you all. I appreciate any additional input.
Mvwright
Super Member
Joined: Jan 2004
Posts: 939
Likes: 5
From: Del Mar, CA
2003 CL600 2005 745Li
I appreciate all of your comments. I understand that buying a S65 is not an inexpensive choice, but I was uncertain if the Renntech upgrades actually added to the maintenance cost of the vehicle or if it lowered the mpg.
To DJE55, I looked at your S65 in your album and it is very similar to the car I am considering. Your input was greatly appreciated.
Thank you all. I appreciate any additional input.
Mvwright
To DJE55, I looked at your S65 in your album and it is very similar to the car I am considering. Your input was greatly appreciated.
Thank you all. I appreciate any additional input.
Mvwright
and this 
all day long !!!! 
Super Member
Joined: Jan 2004
Posts: 939
Likes: 5
From: Del Mar, CA
2003 CL600 2005 745Li
I appreciate all of your comments. I understand that buying a S65 is not an inexpensive choice, but I was uncertain if the Renntech upgrades actually added to the maintenance cost of the vehicle or if it lowered the mpg.
To DJE55, I looked at your S65 in your album and it is very similar to the car I am considering. Your input was greatly appreciated.
Thank you all. I appreciate any additional input.
Mvwright
To DJE55, I looked at your S65 in your album and it is very similar to the car I am considering. Your input was greatly appreciated.
Thank you all. I appreciate any additional input.
Mvwright
and this all day long !!!!
MBWorld God!
Joined: Jul 2010
Posts: 31,273
Likes: 3,916
From: on my way
2012 CLS63
I think if you're considering purchasing a 2008 S65 with the Renntech Upgrade, cost of ownership shouldn't be a consideration.
You're starting off with an expensive car whose sole purpose is to turn fuel, rubber and brakes into atmospheric pollutants as fast as possible.
Then you modify it to make it do everything faster.
And because there was no room to fit any more power-producing hardware, you have to remove the engine to change simple things.
It ain't going to be cheap.
Having said that, I found tyres, brakes, servicing and insurance costs on my S600TT to be surprisingly acceptable. Fuel and repairs are another matter.
Eyes open!
Nick
You're starting off with an expensive car whose sole purpose is to turn fuel, rubber and brakes into atmospheric pollutants as fast as possible.
Then you modify it to make it do everything faster.
And because there was no room to fit any more power-producing hardware, you have to remove the engine to change simple things.
It ain't going to be cheap.
Having said that, I found tyres, brakes, servicing and insurance costs on my S600TT to be surprisingly acceptable. Fuel and repairs are another matter.
Eyes open!
Nick
love that!!!!
Mind if I use that???
Super Member
Joined: Mar 2005
Posts: 763
Likes: 0
From: Maryland
07 S65
I appreciate all of your comments. I understand that buying a S65 is not an inexpensive choice, but I was uncertain if the Renntech upgrades actually added to the maintenance cost of the vehicle or if it lowered the mpg.
To DJE55, I looked at your S65 in your album and it is very similar to the car I am considering. Your input was greatly appreciated.
Thank you all. I appreciate any additional input.
Mvwright
To DJE55, I looked at your S65 in your album and it is very similar to the car I am considering. Your input was greatly appreciated.
Thank you all. I appreciate any additional input.
Mvwright
MBWorld Fanatic!
Joined: Nov 2010
Posts: 2,605
Likes: 343
From: Welwyn, Herts, UK
2006 S600
Having said how expensive tuned TT's are, we've just come back from a touring holiday in my Eurocharged S600. Once out of traffic and cruising on a long run, it averaged 28 to 33 mpg (UK gallons). For a Lambo-chasing luxo-barge, I'd say that was having your cake and eating it. There are still plenty of financial downsides, but I don't think the tune itself makes the engine less efficient; its just down to the control you have over your right foot.
Nick
Nick
