Ok, seems to be my month of working on the 1997's W210 that I own.

Question...1997 W210 Sport....right headlight went dead and I have replaced the bulb but still no light....could it be the ballast and if so, is there a way to test to see if the ballast is working or not? Again, have already replaced the light bulb. Fuse is/was good. I replaced the fuse just for sh#^ and giggles.
Thanks to all....

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Norm K.
'97 E420 Sport
'06 E350 Sedan
'67 Mustang Coupe
'70 F-250
'15 VW Jetta