JohnH

Has anybody with an SL55 or E55 had this done? If so what difference did it make? Have had the ECU remapped and SC pulley changed along with LSD, exhaust mods and additional heat exchanger and wanted to know if the TCU tune would improve the gear changes at all. It is a 2004 SL55.

cal1

don't know the answer, but in the mean time, if you have not reset the adaptive shifting, you should give it a try. I find the shifting on my SL tends toward grandpa mode after adapting to my normal driving. I always do a reset if I am planing on a more spirited run. I can't say I notice a ton of difference, but most people think it helps.

https://mbworld.org/forums/1594315-post1.html

sound 8

I haven't reset my ECU since I got my 65, and after a very slow journey
of 2 hours there and 2 hours back driving very slowly because a van with
my wheels was following me, led to my car not wanting to kick down even
with brutal kicks. Reset the ecu this morning, and wow everything now
works fantastic. How long since you reset yours....

JohnH

Have recently had an ECU remap so doubt this is necessary. If you do it will it set the ECU back to original or back to when it was remapped? Assume this doesnt affect the TCU.

cal1

All this reset does is clear the adaptive shifting of the tranny. It has nothing to do with the ECU mapping so your tune is safe. Like sound 8 said, after lots of driving in traffic or generally slow driving, the shifts get very soft. The reset just puts it back to factory setting.

Check out the discussion on it, you might decide it is worth a try.

https://mbworld.org/forums/w211-amg/...ml#post1594315

cnterline

Kleemann did mine ,I was having a 1 to 2 shift problem which this fixed,just be advised that on our cars the E more then the SL has a program or whatever you want to call it that slightly rolls off the throttle as the car shifts,I see this in my data logging TPS goes from 99% to 85% back to 99% as car shifts gears,hence the slushy shifts lol,prob done to protect the trans

cal1

It has been a while for me. Right after I did the reset for the first time years ago, I was rolling along the freeway at about 50 mph when the lane cleared. I mashed the throttle and got this amazing launch. I looked in to review mirror to see if I had just been rear-ended by a semi. Other times, I don't notice much difference. It could be I don't always perform the reset properly.

JohnH

Will certainly try this before thinking about a tcu tune. Thanks guys!!

sound 8

It really works when you haven't put your foot down for a while.
With a van following me I was down in the 30's for some time, when I got
home went for a Chinese takeaway and I thought there was something
wrong with the gearbox, it only kick down once on the way home, now
it's like conducting an orchestra with your foot.