SL/R230: delete esp!!!
Insert the key. Turn it so it stops on the first click.
Press the reset button 3 times.
On the menu that appears, scroll to a menu that says something like ESP Dynamometer Test, and switch it to on.
https://mbworld.org/forums/w211-amg/209405-dyno-mode-07-08-amg-s.html
It's listed throughout the forum a bunch of times, if you search for "dyno mode". Worked wonderfully for me, looked it up on the net right while I was trying to get the car dyno'd!
To debug, it will be good to know at what point you stopped seeing what the instructions said you would see.
1.) Do you have the odometer on miles when you start? (that's where mine was)
2.) You put the key physically into the ignition and just turn the very first click position? (I think there are 2 click positions before the third which starts the car).
3.) At this point, you should see: "UB: 12.0 V"
If not, maybe there's a problem. It seems to work across platforms since it works similar between the E63 and the SL600. Here's a video (posted by a forum member...):
http://www.youtube.com/watch?v=K3D1yvH9T98
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Instead of tapping reset three times I have to press and hold the button for what seems like forever but is probably 30 to 45 seconds.
https://mbworld.org/forums/showthrea...ight=dyno+mode
https://mbworld.org/forums/c32-amg-c55-amg-w203/201412-dyno-mode.html
It looks like it might work with older vehicles. Worth a shot, I figured...



