300SD USA fog lights?

[bustedbenz]

I've got a burned out fog light on the 300SD and can't figure out what's up with it. Nobody seems to be able to get the bulb anymore; it came up no longer available at Advance.

http://en.wikipedia.org/wiki/File:Mercedes-Benz_500SE.jpg

The lights are the "style" of lights shown in that picture. The headlights are sealed beams. Are the fog lights also "replace the whole box" design? I didn't want to go breaking plastic tabs trying to pull the thing apart until I knew what I was dealing with.

Fastlane lists this part for the left one: http://catalog.peachparts.com/ShopByVehicle.epc?q=&yearid=1982%40%401982&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6206%3AED|10000134%3AMBC|1510%40%40300SD&keyword=fog&subcatid=W0133-1715636@@Fog%20Light%20-%20Left&mode=PA

and this part for the right one: http://catalog.peachparts.com/ShopByVehicle.epc?q=&yearid=1982%40%401982&makeid=63%40%40MERCEDES+BENZ%40%40X&modelid=6206%3AED|10000134%3AMBC|1510%40%40300SD&keyword=fog&subcatid=W0133-1715637@@Fog%20Light%20-%20Right&mode=PA

WHY is the left one $230 while the right one is only $54?

And why are EITHER of them so expensive? Surely this must be for... I don't know, something beyond what I need to replace. All I've got is a burned out bulb. Do I really have to replace this entire unit? Is this the "sealed beam replacement" for lack of a better term, or is there a $5 bulb behind this thing that I haven't figured out how to remove yet?

[Mazootpusher]

I don't think you need to replace the fog lamp itself,all you need is a 12v 55W H3 bulbs.

[GregMN]

1981 through 1985 (sealed beam unit)

unscrew knurled nuts (5) on inside cover of frame

remove the cover frame to the front

unscrew mounting screws (on fog light, 1 top, 1 bottom)

slide back the rubber cap and unplug electrical connections

remove H3 bulb after unclipping the mounting clip

The above is from the FSM.

So, you are gonna remove the trim surrounding the lights from the front after removing the fasteners from the rear. The bulb is a "H3".

[bustedbenz]

Many, many, many thanks.