SL/R230: TCU reset ?
Super Member
Joined: Dec 2002
Posts: 911
Likes: 1
From: Wichita
2005 SL600, 2011 Honda Odyssey Touring Elite
Try this:
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.
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.
Super Member
Joined: Dec 2002
Posts: 911
Likes: 1
From: Wichita
2005 SL600, 2011 Honda Odyssey Touring Elite
I happened on this thread a couple of years back...
https://mbworld.org/forums/w211-amg/...set-works.html
I was skeptical, but I tried it and noticed a difference. I am not sure how it works, but from my understanding it resets the adaptations to the ECU/TCU based on the driver's normal style that are made to improve gas mileage.
https://mbworld.org/forums/w211-amg/...set-works.html
I was skeptical, but I tried it and noticed a difference. I am not sure how it works, but from my understanding it resets the adaptations to the ECU/TCU based on the driver's normal style that are made to improve gas mileage.
Thread Starter
MBWorld Fanatic!
Joined: Sep 2006
Posts: 1,921
Likes: 173
From: Long Island New York
2003 SL55,2020 GTC ,2017 GTS sold ,2002 G500 Sold,2003 SL500 Sold,
TCU tune was done on computer ,was told dealer had to re set driving adaptation memory so it can re learn new values done on the tune
Senior Member
Joined: Jan 2009
Posts: 337
Likes: 0
From: Montrose, CA
2007 SL550
OK, actually I guess if they tuned it, they'd want the car to relearn for whatever they changed. So if they were messing with it anyways, it probably didn't hurt for them to reset it while they were at it. But I'd doubt that the dealer has to do it, just anyone who knows the reset procedure.
Last edited by mlandis; Mar 8, 2009 at 01:08 PM. Reason: Giving the dealer a little bit of credit ;)
MBWorld Fanatic!
Joined: Feb 2004
Posts: 3,703
Likes: 5
From: Arizona
SL55AMG, Ferrari 348, Ferrari Testarossa, Ferrari F40, Ferrari Mondial t, Ducati 916, Indycar
Sometimes it is necessary to reset using the STAR system. Every so often we get a car that even though we tune the ECU, it requires a reset to help things along.
Trending Topics
Senior Member
Joined: Jan 2009
Posts: 337
Likes: 0
From: Montrose, CA
2007 SL550
Like a full system reboot (or some kind of a super-ECU reboot) versus just the ECU reset described in the other thread?
MB World Stories
The Best of Mercedes & AMG
7 Craziest Things AMG Gas Ever Built
Verdad Gallardo
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know
Verdad Gallardo
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
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
Super Member
Joined: Dec 2002
Posts: 911
Likes: 1
From: Wichita
2005 SL600, 2011 Honda Odyssey Touring Elite
To what TCU reset are you referring? Maybe you know something I don't (altogether possible) or maybe you have a problem with your transmission that I don't understand.
You could try the protocol that I referenced. It won't hurt anything and you might be pleasantly surprised. If you don't notice a change, at least it won't have cost you anything.
You could try the protocol that I referenced. It won't hurt anything and you might be pleasantly surprised. If you don't notice a change, at least it won't have cost you anything.
Thread Starter
MBWorld Fanatic!
Joined: Sep 2006
Posts: 1,921
Likes: 173
From: Long Island New York
2003 SL55,2020 GTC ,2017 GTS sold ,2002 G500 Sold,2003 SL500 Sold,
the self adaptation of the TCU ,I wanted to know how to clear it,sort of like disconnecting the ECU for 10 min,the dealer has to do it I found out,they do it with the STAR
