The factory E55 LSD could be retrofitted by AMG in Germany, and part of that included ECU changes (presumably for the traction control).

Anyone know what those ECU changes are? And more importantly, has anyone successfully made those changes to their car? It might be as simple as adding the LSD option to the data card (either option 099 or option 471 "ASR Automatic slip control"), and then re-coding the car.

I ask because I recently had a LSD installed and would love to have the software adaptations as well.

 

maybe it is tweaking the software on the transmission control unit

 

Is it really needed?

 

It's not needed, but Mercedes felt it was benefitial to make the changes.

 

apparently it was one of three upgrades available at the time
1. LSD - no other changes!
2. Transmission changes - this included module update and a small ugly looking switch to change modes
3. de-limiter

mine had the LSD from factory but none of the rest - 090 performance pack code on the data card.

 

Where was the ugly switch located? I've never heard of this before.

 

ebay pp e55

see the link above of a car on uk ebay at the moment with the m1-m2 switch on the gearstick area

 

I have never seen that in the USA. Euro only option??

 

Wow, I never would have thought that switch was factory

 

sorry stupid question.... regular e55s have NO LSD ? thanks

 

No.

 

What does the switch do? It looks homegrown, but then again the factory LSD was installed outside the factory.

 

I found the answer. Switch controls changed between two different shifting speeds

https://mbworld.org/forums/w211-amg/281830-tranny-s-mode-vs-m-mode.html#post3341561