2005 Mercedes-Benz S500 4MATIC Q&A
2005 Mercedes-Benz S500 4MATIC Question: battery went dn, I got a jump. know when I lock door fog lights flash.
Pretty sure this car uses an additional battery for accessories.That may be going dead.I would take it to a shop that is equipped to work on Mercedes.They should have a Xentry diagnostic tool.(We have 2 here)Some settings may need relearning. - ambler