FSS Battery protection conven func temp unavailable
Senior Member
Joined: Sep 2006
Posts: 413
Likes: 3
2003 E320
Search this forum. Use" battery problems" or the key words in the warning. It appears that most of the time this is a precursor to battery replacement. Sometimes it is a battery control module, sometimes it is an alternator/ voltage reg, Have the battery checked. That is the easiest and cheapest fix. The car is choosing to shut down non essential electrical loads to allow the charging system to catch up. It will give you ample warning when it is about to give up
Last edited by Clinton Horn; Jan 24, 2011 at 07:31 AM. Reason: spelling
Junior Member
Joined: Jan 2011
Posts: 59
Likes: 0
03 MBZ E55 AMG
I had this same problem a couple of weeks ago. Turned out my alternator took a dump. It cost about 130 bucks to repair. If you can do the work yourself it's not too bad but having it done could cost upwards of at least 200 or so
