My 2004 Mercedes Benz E320 dashboard blicks on and the inside lights stay on after I shut of the engine an removed the keys causing the battery to die over night

SOURCE: method of charging a 2004 Mercedes E320 battery

It is always safer to charge the battery out of circuit, Removal of one cable will insure you can safely charge without hurting electronics on board. Generally if your battery is already sufficiently charged it acts like a capacitor in the circuit and will prevent damage, but many battery chargers do not always put out a pure dc voltage and this can damage electonics.

SOURCE: SRS LIGHT ON E320 MERCEDES 1999

sorry but your going to have to take it to the dealer to get that light reset.

SOURCE: how to reset srs light on 1996 e320 mercedes benz

try disconecting negative battery terminal for a few seconds

SOURCE: 04 chrysler pacifica dashboard lights stay on & drains my battery

my dash lights stay on after i turn off my van, the fan stays on also the alarm does not work or the keyless entry does not work.

SOURCE: How do I remove the door panel on a 1995 Mercedes

pull off rear mirror panel, pull off electric seat adjuster knobs, pull off plastic around door handles. Unbolt top of handle. Pull out light at bottom of door. Unscrew plastic stiker plate and remove. Unscrew lock knob to remove. Then your ready to wiggle and pull the panel up and off, be careful of the area around the door handle, you may even want to pry that area out before you begin.