This is a MUST with anyone having their transmission act funny!

[benzonline]

Resetting the transmission ECU..Ive tried it and it works.

You can reset the adaptation YOURSELF.
IF you follow this procedure the trans WILL re-learn!

ALL shifts must happen below 1900 RPM!!!
Select 1st gear & slowly accelerate thru the gears upto 5th & then coast back to a stop.

DO that 4 times & then let the car sit at idle for 10 minutes! After idling for 10 minutes shut off for 1 minute.

AT that point the trans adaptation should take place.

Good luck

[rollinrealbig]

but how does that do anything ? :confused:

[vbrock1137]

I almost want to try that just for the hell of it. :D

Any idea how long it takes to adapt during normal driving, like if two people, aggresive vs. grannie drive it?

[benzonline]

This is more like the "initial, permanent" adaption. Of course this is for the 722.6 adaption transmissions.

I thought it wouldnt work but it did. When I put my new MAS in the first time, I kept the revs too high and drove too fast while the car was adapting so it messed up the shifting in the long run.

The other adaptations the transmission has is for short term, meaning if im gonna drive it slow it will adapt to that...then I nail it for a few blocks, watch as the gears act different and revs stay higher. Drive another block slowly and they come down BUT the initial proper gearing as in this process above will stay the same.

Kind of confusing...

[bc24]

Who told you about this?

[benzonline]

MB DOC from mercedesshop.

[htfan1]

Is this adaptation procedure limited to newer 202s? Or will it work on older models (1994, 1995, etc.) too?

[stox]

Originally posted by htfan1
Is this adaptation procedure limited to newer 202s? Or will it work on older models (1994, 1995, etc.) too?

No, as those models do not have an adaptive transmission. The first year for these was '97.

[audiophile]

this sounds the same as if one would switch to winter mode for about 5 min. to reset the tranny.

after switching the tranny to standard mode after the the 5 mins. you drive normally and the tranny adapts to the driving style of the user.:D

[benzonline]

Well I tried the W, S thing...doesnt work!

You need to follow this procedure or dealer.

[jnolte]

or you could disconnect the battery for a few minutes

[rollinrealbig]

do you guys think this would work on a GS300 lexus ?

my friend did sumthing with his tranny and it accelorates really crappy.

[jnolte]

Originally posted by rollinrealbig
do you guys think this would work on a GS300 lexus ?

my friend did sumthing with his tranny and it accelorates really crappy.

this method does not 'fix" your trannsmission it simply resets it so you can set the shifts for you liking.

if your freinds GS accelerates shit like it could be a bucket load of things that problay do not involve the transmission. These range from spark plugs to MAS to just needing a tune up.

does it have a check engine light on?

[benzonline]

Now this method that I tried and apparantly worked....how does the car KNOW im resetting and programming the transmission to my liking and at what point does it program? When its off for 1 min?

[Ashkan's C280]

can't you just go to the dealer and have the reset it with star diag? seems weird, I might try it tomorrow....

[renerodz]

Hi there,

Benzonline is correct, I knew I saw this somewhere :beard:

A little more detailed info. See the 5th item here: "MB SHift Adaptation". The next item is the same but using the computer.

http://www.europeantransmissions.com/Bulletin/merctechlib.htm

Rene

[benzonline]

At the end of the document "Mercedes Transmission Optimize" there is the section explaining "field expeirence" to adapt the 722.6.

Is this the one I should follow? I beleive you take each gear seperately to 2400rpm then coast to a stop?

[renerodz]

Note that on this and the next document "Mercedes Benz 7226 Adaptation" shows a table with the max RPMs on each of different engines. The 4, 6 and 8 cylinders use different max RPM's.

Rene

[benzonline]

I have the M111 engine so it would/should not exceed 2400 rpm.

[Polestar]

Someone asked if detaching the battery (for 30 min., I've heard) will accomplish the same thing? ( this necessatates all systems to reboot and go to default settings)
Does this do the same thing as following the '....transmission optimize-adaptation procedure...' on the link above?

Also, Benzonline describes having success while placing shifter in Drive and going through the gears, yet the link describes selecting ea. gear individually.
Does either way work?

[benzonline]

I did it with each seperate gear.

[Polestar]

I did it with each seperate gear.

OK.

What exactly was going on with your transmission that this procedure fixed?

What I'm stating to notice is at very, very slow speed (like when I pull into a parking area, and I'm looking for a space) the transmission will downshift hard. It doesn't happen all the time, but seems wrong.

[benzonline]

Well when I put the new MAS sensor for some reason the shifting was not as refined...before the sensor change, the shifts were only noticeable by the tach...but I had a big loss in power.

This procedure seemed to help but occasionally it likes to hold 3rd gear for too long.

[renerodz]

What I'm stating to notice is at very, very slow speed (like when I pull into a parking area, and I'm looking for a space) the transmission will downshift hard. It doesn't happen all the time, but seems wrong.

This is normal on these transmissions.

Rene