I have been using 80/100 watt bulbs and they have worked well in my 300E. No melting problems at all, the harness seems to be the same wonderful mercedes quality as other parts. I have some random brand, but I recommend the PIAA superwhite bulbs, my friend has them in his Alfa and they are quite an improvement. They cost about $75 a pair, and can be found at most import auto stores or online.

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Chris
'87 300E