Is that in an SL?

I'd guess that the computer isn't getting power, or has failed. Start by checking, and if it hasn't been done yet, replace all the fuses. The aluminum gets brittle over time.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.