400SEL light indicator problem

Hi! I have a MB 400SEL (1993) here in Finland. The problem is : When I start the engine without touching anything else, the light indicator on the dashboard turns on (so it indicates that one or more exterior lamp is
broken). This happens BEFORE I turn the head lights on. ALL ext. lamps are OK. So called specialists in Finland can´t help me. Any ideas, what to do? Thanks! Kari Järvikallio, MD
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check that both plate lights are working
case
the case, minus a few cans!
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