SL/R230: anyone know how to reset our ecu or adaptive transmission
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Yes it will
work for your 2003 it will work on any model with fly by wire controlled throttle and 722.6 5speed electronically controlled trans or 722.9 7 speed,
Almost every model since 1998
And no it can't be set as the default since it is part of the transmissions TCU adaptive learning process. That doesn't mean you can't perform it once a week if desired but if you drive it briskly enough to want to do it once a week your transmission is never going to be in sedate mode anyway
Ten seconds works better than 5 and wait 5 minutes to drive it or the readapt might not set.
Also to make sure of readapt make sure the door is closed and radio is off when you perform it.
Almost every model since 1998
And no it can't be set as the default since it is part of the transmissions TCU adaptive learning process. That doesn't mean you can't perform it once a week if desired but if you drive it briskly enough to want to do it once a week your transmission is never going to be in sedate mode anyway
Ten seconds works better than 5 and wait 5 minutes to drive it or the readapt might not set.
Also to make sure of readapt make sure the door is closed and radio is off when you perform it.
Last edited by ohlord; Nov 2, 2010 at 09:18 PM.
Newbie
Joined: Nov 2010
Posts: 1
Likes: 0
E200 Kompressor (01)
soft reset worked a charm
following the ....
Turn the ignition key to the on (not start) position.
Press the gas pedal to the floor and hold for five seconds.
Turn the key to the "off" position (don't remove the key), then release the gas pedal.
Wait at least two minutes for ECU to reset.
after 2 mins exactly from turning the key to the off position you can hear a click from behind the steering binnacle.
I prefer to shift higher up so this worked a treat.
I had a ball of codes in the ECU with limp home mode etc,
changed the tranny electrical connector, ATF had wicked up into the ECU, took it out and cleaned it off with electrical contact cleaner.
before doing the soft reset the car wouldn't engage from park, had to do the pen in the gap trick to get the solenoid to release and then when i went out of D couldn't get back to R or P without turning off.
soft reset sorted all that including the solenoid bit.
I had pulled the shifter mechanism out and took it down to it's boards, hit it with contact cleaner as well. it was filthy down there, the previous owner must have been a pig. you could see where fluid had stained up the concertina cover and the board itself.
happy,
d.
Turn the ignition key to the on (not start) position.
Press the gas pedal to the floor and hold for five seconds.
Turn the key to the "off" position (don't remove the key), then release the gas pedal.
Wait at least two minutes for ECU to reset.
after 2 mins exactly from turning the key to the off position you can hear a click from behind the steering binnacle.
I prefer to shift higher up so this worked a treat.
I had a ball of codes in the ECU with limp home mode etc,
changed the tranny electrical connector, ATF had wicked up into the ECU, took it out and cleaned it off with electrical contact cleaner.
before doing the soft reset the car wouldn't engage from park, had to do the pen in the gap trick to get the solenoid to release and then when i went out of D couldn't get back to R or P without turning off.
soft reset sorted all that including the solenoid bit.
I had pulled the shifter mechanism out and took it down to it's boards, hit it with contact cleaner as well. it was filthy down there, the previous owner must have been a pig. you could see where fluid had stained up the concertina cover and the board itself.
happy,
d.
Junior Member
Joined: Jun 2007
Posts: 52
Likes: 0
From: Michigan
2004 SL600, 2006 Range Rover SC
<sigh> I don't know that I'm doing this correctly. I didn't notice the external temperature do anything when I re-started. Maybe I drive too conservatively, lol.
One thing I found confusing about this thread is whether taking your foot off the pedal was actually the last step. You have to hold it down while waiting the minimum of 5 seconds before turning off the key and continue holding it down for the minimum of 2 minutes before pulling the key out?
One thing I found confusing about this thread is whether taking your foot off the pedal was actually the last step. You have to hold it down while waiting the minimum of 5 seconds before turning off the key and continue holding it down for the minimum of 2 minutes before pulling the key out?
Senior Member
Joined: Oct 2006
Posts: 379
Likes: 3
From: Southcoast England
CL500 216
This is all an old wives tale,,,, yes the gearbox talks to the engine, but the box only has a very tiny memory,,, so you are in a hurry and using kickdown, then the box will adapt to this,,you hit a 30 limit area and you slow down and within a very short time the box is back to a more leisurely change..
You can check this out easily, enter a free way accelerating hard and engage CC and the car will change down on up hills to maintain that speed. Enter the free way slowly and engage the CC and the chances are the box will not change down to re gain the set speed
You can check this out easily, enter a free way accelerating hard and engage CC and the car will change down on up hills to maintain that speed. Enter the free way slowly and engage the CC and the chances are the box will not change down to re gain the set speed
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
Member
Joined: Sep 2011
Posts: 98
Likes: 2
From: Wilmington NC
2004 CL500
Works like a Charm! Results after ECU reset:
2004 Mercedes benz CL500
Oct 8, 2011 1:06 PM
Acceleration
0-10 MPH:0.89 sec
0-20 MPH:1.86 sec
0-30 MPH:2.81 sec
0-40 MPH:3.91 sec
0-50 MPH:5.09 sec
0-60 MPH:6.53 sec
0-70 MPH:8.44 sec
Elapsed Time
60':2.64 sec@26.6 MPH
330':6.60 sec@59.0 MPH
1/8 mi:9.85 sec@74.1 MPH
1000':12.92 sec@76.9 MPH
1/4 mi:15.75 sec@76.9 MPH
Miscellaneous
Max Speed:77.9 MPH
Max Acceleration:0.88 G's
Peak Horsepower:320 HP
Generated by Dynolicious
Sent from my iPhone
2004 Mercedes benz CL500
Oct 8, 2011 1:06 PM
Acceleration
0-10 MPH:0.89 sec
0-20 MPH:1.86 sec
0-30 MPH:2.81 sec
0-40 MPH:3.91 sec
0-50 MPH:5.09 sec
0-60 MPH:6.53 sec
0-70 MPH:8.44 sec
Elapsed Time
60':2.64 sec@26.6 MPH
330':6.60 sec@59.0 MPH
1/8 mi:9.85 sec@74.1 MPH
1000':12.92 sec@76.9 MPH
1/4 mi:15.75 sec@76.9 MPH
Miscellaneous
Max Speed:77.9 MPH
Max Acceleration:0.88 G's
Peak Horsepower:320 HP
Generated by Dynolicious
Sent from my iPhone
Last edited by John CL500; Oct 18, 2011 at 11:49 AM.
MBWorld Fanatic!
Joined: Apr 2009
Posts: 1,139
Likes: 0
From: Lincoln, NE
2005 SL600, 2016 ES300h, 2012 Hayabusa
This is all an old wives tale,,,, yes the gearbox talks to the engine, but the box only has a very tiny memory,,, so you are in a hurry and using kickdown, then the box will adapt to this,,you hit a 30 limit area and you slow down and within a very short time the box is back to a more leisurely change..
You can check this out easily, enter a free way accelerating hard and engage CC and the car will change down on up hills to maintain that speed. Enter the free way slowly and engage the CC and the chances are the box will not change down to re gain the set speed
You can check this out easily, enter a free way accelerating hard and engage CC and the car will change down on up hills to maintain that speed. Enter the free way slowly and engage the CC and the chances are the box will not change down to re gain the set speed
