Date registered: Feb 2008
Vehicle: 2004 W220 (S430) ; 2001 R129 (SL500) Sport
Location: Alabama Gulf Coast--formerly Charlottesville, VA
Mentioned: 0 Post(s)
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It could be as simple as a dead battery. I'm sure you aren't still on the original battery, so there may be no charging system problem at all, just a battery replacement. You may also have a closed switch somewhere that is draining the battery (interior lights, parking lights....). Don't go changing stuff until you have the battery load tested. If it's good under load, check for closed switches.
"Don't pick a fight with an old man. If he is too old to fight, he'll just kill you."--John Steinbeck