FWIW,


Ok, a week after the SLS mssg showed up the battery collapsed almost completely. I got a new battery and installed it thinking that might be the cause of the problem but no luck.

So I continued the search and checked all the compenents like the relays, compressor and sensors. To no avail, all was well under the vehicle. So, as a last resort I was going to ask the dealer to reset the EHC and drove out last night to drop it off.

To my amazement about halfway to the dealer (10 miles out) I discovered that the warning was gone and the system came back alive. I played a bit with it and then turned back home. This morning all was fine as well.

So, I have to conclude that the battery failure is likely to have been the culprit in this case. Not sure but it is a bit too much of a coincidence I think.

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2003 4.4i black ext./black int./black headliner (kid's runabout)
2014 535d X-drive, M package, silver/black interior

Sold but not forgotten:
2009 E70 35d, black ext./black int./black headliner (sold 2021)
2006 4.8iS Le Mans blue/cream int./black headliner, SOLD in 2012 sadly...

Other hardware:
2015 Cayenne S (wife's new DD and definitely wroooommmmm)
2016 Tundra 1794 edition crew cab, luxo hauler
2005 Tundra crew cab, weekend hauler. Sold after 150k very happy miles.