Jun 17, 2015, 03:24 PM
Last edit by: IB Advertising
See related guides and technical advice from our community experts:
- Mercedes-Benz E-Class AMG: How to Reset Your ECU
Step by step instructions for do-it-yourself repairs
Gonna try resetting ECU/Tranny....let's see what happens.
Thread Starter
MBWorld Fanatic!
Joined: Jan 2004
Posts: 7,092
Likes: 13
From: Salt Lake City (but not Morm)
2003 E55 & 2014 GL550
Gonna try resetting ECU/Tranny....let's see what happens.
Bottom line is I drove her back from Kleemann in Co Springs over 700 miles at smooth highway speeds. Cory said this car set up the system with granny settings. He told me that if I disconnected the negative terminal overnight, then hammered it for about 300 miles.....real hard. She would setup the motor and tranny with a more performance aspect.
Couldn't hurt......will let you know what I find out with it.
Couldn't hurt......will let you know what I find out with it.
Banned
Joined: May 2004
Posts: 3,797
Likes: 2
From: Richmond Hill, Ontario
2003 E55 AMG
Originally Posted by Jakpro1
Bottom line is I drove her back from Kleemann in Co Springs over 700 miles at smooth highway speeds. Cory said this car set up the system with granny settings. He told me that if I disconnected the negative terminal overnight, then hammered it for about 300 miles.....real hard. She would setup the motor and tranny with a more performance aspect.
Couldn't hurt......will let you know what I find out with it.
Couldn't hurt......will let you know what I find out with it.
Also, I find that it changes the behaviour in S mode quite a bit. It holds higher RPMs and initial throttle response is quicker. (or maybe it's all in my head.. who knows..) It sure is fun going through the procedure though..
I disconnect overnight, go to my local "test track" and run repeatedly from a deadstop at WOT until I run out of road.
Super Member
Joined: Aug 2005
Posts: 953
Likes: 2
2004 E55
OK, I know the computer has to learn your driving behavior and that it takes about 300 miles. Is this a constant learning curve? If you have it taught for Granny mode what would happen if you simply drove hard for 300 miles after that without reseting the computer? The computer learning thing is a little confusing. What happens if you reset the computer, drive hard for 300 miles so you can have performance fun and then get caught it granny traffic for the next 1000 miles (such rush hour work traffic for a couple of week)?
Super Member
Joined: May 2004
Posts: 791
Likes: 0
From: Monroe, Louisiana
SL 65 AMG and E63s AMG
Originally Posted by dsc
OK, I know the computer has to learn your driving behavior and that it takes about 300 miles. Is this a constant learning curve? If you have it taught for Granny mode what would happen if you simply drove hard for 300 miles after that without reseting the computer? The computer learning thing is a little confusing. What happens if you reset the computer, drive hard for 300 miles so you can have performance fun and then get caught it granny traffic for the next 1000 miles (such rush hour work traffic for a couple of week)?
Super Member
Joined: Aug 2004
Posts: 588
Likes: 0
From: Gwinnett County, GA
2005 E55 AMG
Supposedly, the following procedure works with any "drive by wire" vehicle _without_ having to disconnect the battery:
1. Turn the ignition key to the on (not start) position.
2. Press the gas pedal to the floor and hold for five seconds.
3. Turn the key to the "off" position (don't remove the key), then release the gas pedal.
4. Wait at least two minutes for ECU to reset.
I've tried it once and it seemed to work, but there seems to be no substitute for slammin' the throttle and letting the system learn by itself. Welcome others experience.
1. Turn the ignition key to the on (not start) position.
2. Press the gas pedal to the floor and hold for five seconds.
3. Turn the key to the "off" position (don't remove the key), then release the gas pedal.
4. Wait at least two minutes for ECU to reset.
I've tried it once and it seemed to work, but there seems to be no substitute for slammin' the throttle and letting the system learn by itself.
Welcome others experience.
Trending Topics
Senior Member
Joined: Apr 2005
Posts: 288
Likes: 0
From: Orlando FL
2010 ZR1 2011 JGC Overland 2013 ML63 on order
Anyone else try re-setting their computer this way?
I have been disconnecting the battery and it's a pain in the butt. I also experienced a situation where the windows didn't work properly when you open and close the doors for about 15 minutes. Needed to re-set those too to get em working again.
I have been disconnecting the battery and it's a pain in the butt. I also experienced a situation where the windows didn't work properly when you open and close the doors for about 15 minutes. Needed to re-set those too to get em working again.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Banned
Joined: May 2004
Posts: 3,797
Likes: 2
From: Richmond Hill, Ontario
2003 E55 AMG
Thanks for this tip!! I will try this method the next time I have to do the reset. This is definitely much less painful than having to pull the battery wires. 
Originally Posted by Beowulf
Supposedly, the following procedure works with any "drive by wire" vehicle _without_ having to disconnect the battery:
1. Turn the ignition key to the on (not start) position.
2. Press the gas pedal to the floor and hold for five seconds.
3. Turn the key to the "off" position (don't remove the key), then release the gas pedal.
4. Wait at least two minutes for ECU to reset.
I've tried it once and it seemed to work, but there seems to be no substitute for slammin' the throttle and letting the system learn by itself. Welcome others experience.
1. Turn the ignition key to the on (not start) position.
2. Press the gas pedal to the floor and hold for five seconds.
3. Turn the key to the "off" position (don't remove the key), then release the gas pedal.
4. Wait at least two minutes for ECU to reset.
I've tried it once and it seemed to work, but there seems to be no substitute for slammin' the throttle and letting the system learn by itself.
Welcome others experience.Last edited by vrus; Jan 17, 2006 at 10:16 AM.
Super Member
Joined: Aug 2005
Posts: 953
Likes: 2
2004 E55
Victor,
I am curious to know if doing the throttle trick gives you the same result as disconnecting the battery. I have tried it and didn't find any difference. I have not tried disconnecting the battery yet, too much to reset.
I am curious to know if doing the throttle trick gives you the same result as disconnecting the battery. I have tried it and didn't find any difference. I have not tried disconnecting the battery yet, too much to reset.
Banned
Joined: May 2004
Posts: 3,797
Likes: 2
From: Richmond Hill, Ontario
2003 E55 AMG
Originally Posted by dsc
Victor,
I am curious to know if doing the throttle trick gives you the same result as disconnecting the battery. I have tried it and didn't find any difference. I have not tried disconnecting the battery yet, too much to reset.
I am curious to know if doing the throttle trick gives you the same result as disconnecting the battery. I have tried it and didn't find any difference. I have not tried disconnecting the battery yet, too much to reset.
Super Member
Joined: May 2004
Posts: 791
Likes: 0
From: Monroe, Louisiana
SL 65 AMG and E63s AMG
Originally Posted by Beowulf
Supposedly, the following procedure works with any "drive by wire" vehicle _without_ having to disconnect the battery:
1. Turn the ignition key to the on (not start) position.
2. Press the gas pedal to the floor and hold for five seconds.
3. Turn the key to the "off" position (don't remove the key), then release the gas pedal.
4. Wait at least two minutes for ECU to reset.
I've tried it once and it seemed to work, but there seems to be no substitute for slammin' the throttle and letting the system learn by itself. Welcome others experience.
1. Turn the ignition key to the on (not start) position.
2. Press the gas pedal to the floor and hold for five seconds.
3. Turn the key to the "off" position (don't remove the key), then release the gas pedal.
4. Wait at least two minutes for ECU to reset.
I've tried it once and it seemed to work, but there seems to be no substitute for slammin' the throttle and letting the system learn by itself.
Welcome others experience.
MBWorld Fanatic!
Joined: Jun 2002
Posts: 1,436
Likes: 11
From: Treasure Coast
2018 Mclaren 720s, 2021 Aston Martin DBX
Originally Posted by Vetluver
Try driving the heck out of for few blocks that seems to make the same change to me.
I did this to my neighbor's S-class and he thought it had had a tune-up.
Disconnecting the battery erases your previous driving mode, but letting the computer learn your new style of driving is more fun.
MBWorld Fanatic!
Joined: Nov 2004
Posts: 1,143
Likes: 3
From: Sydney, Australia
2017 S63 Coupe Iridium Silver
Originally Posted by Jakpro1
Bottom line is I drove her back from Kleemann in Co Springs over 700 miles at smooth highway speeds. Cory said this car set up the system with granny settings. He told me that if I disconnected the negative terminal overnight, then hammered it for about 300 miles.....real hard. She would setup the motor and tranny with a more performance aspect.
Couldn't hurt......will let you know what I find out with it.
Couldn't hurt......will let you know what I find out with it.
MBWorld Fanatic!
Joined: Nov 2004
Posts: 1,143
Likes: 3
From: Sydney, Australia
2017 S63 Coupe Iridium Silver
Originally Posted by Tony007
Anyone else try re-setting their computer this way?
I have been disconnecting the battery and it's a pain in the butt. I also experienced a situation where the windows didn't work properly when you open and close the doors for about 15 minutes. Needed to re-set those too to get em working again.
I have been disconnecting the battery and it's a pain in the butt. I also experienced a situation where the windows didn't work properly when you open and close the doors for about 15 minutes. Needed to re-set those too to get em working again.
MB came in with a new battery and replaced it. I had to then go to the dealership to re-load a whole heap of data lost in the process. Apparently it is a normal thing when you disconnect a battery.
If you have done it, your ECU and everything else that's electronic now runs on about 40% of it's previous "intelligence". Go to the dealer to re-boot.
MBWorld Fanatic!
Joined: Apr 2005
Posts: 2,731
Likes: 3
From: Sin City
12' C63 P31, 06' Supercharged Range, 08' BMW 550i
Originally Posted by vrus
I am scheduled to do another ECU tune in the next day or two. I'll try it and will see what happens.
BTW -- have you ran your car yet? What were your times? We are pushing about the same power and I'm just curious. Thanks.
Newbie
Joined: May 2007
Posts: 20
Likes: 0
From: Fairfax, VA
CL 55 AMG
Hell, Yeah it works.
No more of that hesitation off the line, definite stronger growl off the line, more responsive throttle, the works.
Best 10 second ever spent.
Thanks for the tip.
2003 CL 55 Silver/Black
No more of that hesitation off the line, definite stronger growl off the line, more responsive throttle, the works.
Best 10 second ever spent.
Thanks for the tip.
2003 CL 55 Silver/Black
Junior Member
Joined: Jul 2008
Posts: 33
Likes: 0
From: Virginia
2004 e55, 2009 Range Rover, 2005 Honda MV
I've done this several times and it definitely works...just read the above thread and do exactly what the instructions say...make sure you wait the 2 minutes, I wait about 2.5 just to make sure. If you're wondering if it worked on not then you didn't to it right. You should notice a MASSIVE difference unless you are hard on the car daily and therefore the ECU has already adaptively set itself up this way, most people don't.
When I first did it I was shocked! car was peeling out all over the place, just busting it through 1st 2nd and 3rd everytime.
When I first did it I was shocked! car was peeling out all over the place, just busting it through 1st 2nd and 3rd everytime.
MBWorld Fanatic!
Joined: Nov 2006
Posts: 9,137
Likes: 4
From: California, USA
E63 P30, CL500 Sport
LOL..... because of all that's been happening with JakPro's TCU/MHP situation, I thought this was an update, but when I clicked on the thread, it turned out to be 3 years old
Senior Member
Joined: Apr 2009
Posts: 453
Likes: 0
CLS55 AMG 030
I have a question about this.
What is the "ON" position? Are we talking the RUN position? and not the steering unlock position where in everything in the car basically comes on ?
Also ... I read in another forum, that the pedal should be held to the floor but DO NOT PUSH THE KICK DOWN SWITCH.
What do you think about this?
I was having some hesitation/slow shifting issues, so I did this and it seemed to clear it up nicely.
What is the "ON" position? Are we talking the RUN position? and not the steering unlock position where in everything in the car basically comes on ?
Also ... I read in another forum, that the pedal should be held to the floor but DO NOT PUSH THE KICK DOWN SWITCH.
What do you think about this?
I was having some hesitation/slow shifting issues, so I did this and it seemed to clear it up nicely.
Former Vendor of MBWorld
iTrader: (1)
Joined: May 2008
Posts: 12,139
Likes: 295
From: Houston
2003 W211 E55, 2003 W220 S600
ON position is before run position. our car have 3 position. ON the middle one first one being off. Only the SRS light is on in the ON position.
I though you had to press the kick down feature.
I though you had to press the kick down feature.
Thread Starter
MBWorld Fanatic!
Joined: Jan 2004
Posts: 7,092
Likes: 13
From: Salt Lake City (but not Morm)
2003 E55 & 2014 GL550
LOL, ya know, I was one of the first to post on this years ago and we've gone round and round so much that I honestly forgot which position it is supposed to be in.
I don't mess with it much anymore as I have a Star and just wipe tranny adapts with Star.
I know FOR SURE it has nothing to do with "not touching" that kickdown switch at the bottom of the pedal so don't worry bout that. Hold her allll the way down.
Biggest thing (IMO) is not to open the door or disturb the car after the reset. Just sit there for 3 mins. If you have a watch, you can time it and you'll here a "click" under the dash. Not sure what exactly happens but she's a whole new beast after that click.
Who would have thought that resetting those tranny adapts would make such a huge impact.
I don't mess with it much anymore as I have a Star and just wipe tranny adapts with Star.
I know FOR SURE it has nothing to do with "not touching" that kickdown switch at the bottom of the pedal so don't worry bout that. Hold her allll the way down.
Biggest thing (IMO) is not to open the door or disturb the car after the reset. Just sit there for 3 mins. If you have a watch, you can time it and you'll here a "click" under the dash. Not sure what exactly happens but she's a whole new beast after that click.
Who would have thought that resetting those tranny adapts would make such a huge impact.
Senior Member
Joined: Apr 2009
Posts: 453
Likes: 0
CLS55 AMG 030
I tried it in the "ON" position and the "RUN" position and it seemed to work in the run position for be (The one right before starting the car)
Maybe I did something else.
Also I got out of the car and came back.
MBWorld Fanatic!
Joined: Dec 2005
Posts: 1,653
Likes: 5
From: Ann Arbor
'03 SL55
Former Vendor of MBWorld
Joined: Oct 2008
Posts: 1,181
Likes: 4
From: Long Island, NY
Whatever we're tuning!
The tranny reset can be done with SDS and like Victor said it makes the shifting SNAP into gear.
Remember if you drive a car like a pu$$y it will be one especially with the adaptive properties of many new ECU/TCU's.
Remember if you drive a car like a pu$$y it will be one especially with the adaptive properties of many new ECU/TCU's.
