I replaced the light bulb for the fibre optic spider on my 91 SDL. On my car this only illuminates the vent controls, rear defrost, and rear dome light switches; on earlier models it did more. I also changed the lamp for the "shift program".

Here's a (somewhat long but detailed) video showing the process:


Thanks,

-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.