SL/R231: ECO system
Senior Member
Joined: May 2012
Posts: 395
Likes: 1
From: Florida
AMG SLS & S coupe
I'd really like to see mine work consistently. It's as if mine has an intermittent bad sensor
MBWorld Fanatic!
Joined: Jan 2013
Posts: 1,171
Likes: 416
From: Irvine, California
2022 AMG SL63
I just don't pay any attention to it anymore as it makes little discernible sense to me. I figure it's likely working given its instruction set - and I know it's complex - so when I come to a light and the engine stops I know it's "on"'- otherwise I ignore it. My engineering mind spent some time when I first had the car on the ECO system- but I gave up trying to understand it. Made no more sense than a woman's thinking 
Super Member
Joined: Jul 2006
Posts: 623
Likes: 131
From: pittsburgh
'25 740i; '15 targa4s; '24 cayenne
^ this. spot on. i have no idea if mine is working properly or not. no clue. absolutely clueless. i am without clue. all i know is that i have not been stranded or put in danger yet. fast approaching 2k miles now and can not make rhyme or reason out of it or how it works. shrug.
Member
Joined: Jan 2002
Posts: 155
Likes: 12
From: San Francisco
2015 S550 Coupe
Still for me, the ECO system seems to be doing as advertised and shuts off the engine at times. Yesterday, we were diving with the top down and I noticed the ECO system was yellow while parked with the engine running. But later at a stop sign it was normal and shutoff the engine (still with the top down).
I suspect that (my) city driving most frequently matches the (mystery) scenarios necessary for ECO shutoff.
