I'm finally upgrading to Euro headlights. What bulbs can I safely run with the factory wiring? I think they originally came with 55/100s but can I upgrade to 80/100s? How about those Silverstars or Nighthawks that I often hear about? Also, what bulbs are needed for the fog lamps? Do the Euro lamps keep the yellow bulbs or are they white?

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1989 300CE

They originally came with 60/55w lamps, and that's all I'd want to run in them considering how wimpy the factory wiring and alternator are.

I have a set of high performance, stock wattage lamps in my SDL. I'm very happy with the light they put out. I did a simple comparison here: Philips X-treme Power lamps: a review

-Jason

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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.