Fault on dashboard instruments

Question by christian-frederickmattner posted 2 months ago in 1998-2005 (W163)

Hi I require advice on how to deal with the erratic behaviour of my dashboard warning lamps.

on occasion, without warning, all warning lights on my dash/instrument panel come on--together with an audible warning sound .

The car continues to operate ok-ish--everything works with exception of speedometer &  no change of gears.

I have to stop, switch off the engine.

On restarting the engine the fault rests --until the next time---which could be minutes, hours or days later.

I get all kinds of conflicting advice,incl from Merc dealer.

Can ANYBODY PLEASE HELP ME WITH A SOLUTION?
 

Thank you for your help

Dr.C.F.Mattner