Transmission real life differences
MBworld Guru
Joined: Dec 2009
Posts: 10,782
Likes: 1,011
NO LONGER ACTIVE
Actually, every W209 through MY2004 used the 722.6.
For MY2005, the CLK500 had the 722.9, the other W209 CLK's (the various I4s, V6s, diesels, and CLK55 AMG) still used the 722.6.
For MY2006, all non-AMGs used the 722.9.
For MY2007 and later, all W209's used the 722.9
For MY2005, the CLK500 had the 722.9, the other W209 CLK's (the various I4s, V6s, diesels, and CLK55 AMG) still used the 722.6.
For MY2006, all non-AMGs used the 722.9.
For MY2007 and later, all W209's used the 722.9
Super Member
Joined: Oct 2012
Posts: 538
Likes: 89
From: Hollywood, CA
W209, W124
I found a guy in a W203 forum who found a value in SDS that might solve some of my issues.
It is a gas pedal damper value, literally it "softens" inputs from gas pedal to TCU in case you bump throttle. The folks who tried it report whole new engine feel.
I just need to dig my SDS out of garage and see if it is still booting, etc.
It is a gas pedal damper value, literally it "softens" inputs from gas pedal to TCU in case you bump throttle. The folks who tried it report whole new engine feel.
I just need to dig my SDS out of garage and see if it is still booting, etc.
MBworld Guru
Joined: Dec 2009
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I'd love to know what that setting is. I've poked around in SDS developer mode and have it translated:
http://benzbits.com/ImplicitCodingME97.pdf
I am guessing maybe the Pedal Characteristic Curve?
http://benzbits.com/ImplicitCodingME97.pdf
I am guessing maybe the Pedal Characteristic Curve?
Junior Member
Joined: Dec 2014
Posts: 25
Likes: 0
2006 CLK 500
Thanks for that info on the 722.6 update. And it doesn't surprise me. I know there have been many TCU software updates. For example, the original 722.6 TouchShift code would not automatically upshift at redline - it would just drop RPMs by about 200 and "stay there" until the driver shifted. Also, on the 722.9, they made a change so that it does not downshift to 1st until you come to a complete stop. This was done to eliminate a clunk/jerk when coming to a stop.
What I find particularly interesting is, although I don't always get the clunk/jerk just driving down the road normally I will, without fail, get it when I'm pulling into my garage. I'll come to a complete stop in the driveway, open the garage door, then slowly start to pull in. As the front tires take the little lip up into the garage I'll let off the gas to make sure I'm heading in properly (understand the car is still moving under its own power) and as I hit the gas again I get the clunk/jerk.
I did the adaptive shifting reset tonight and noticed a marked improvement in shift points, throttle responsiveness, as well as no clunk/jerk pulling into the garage. So we'll see...
MBworld Guru
Joined: Dec 2009
Posts: 10,782
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NO LONGER ACTIVE
When you say you did the reset, you mean the thing with the accelerator and ignition switch? That just re-syncs the electronic throttle, not the TCU. But it can definitely help with jerky throttle response. If you want to now what the 2-1 downshift clunk is like, use the TouchShift to drop into 1st gear as you are slowing down, right before coming to a stop. That can be fixed with the latest TCU code.
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