This is for a rare NOS interior light upgrade for some W123's. This has the rare map/reading light plus an additional position on the switch that has the symbol of a book. This will only fit W123's with the more boxy rectangular dome light. If you are not sure just send me a photo of what you have. This is plug and play. The lens design on the reading light makes it very bright and highly directional towards the passenger so that it does not affect your night vision. It works very well. There is also a max setting that turns both lights on at the same time. The automatic dome light function still uses the single main bulb. This comes with the correct incandescent bulbs. When Mercedes discontinued these lenses, like all such parts, the manufacturer(Hella) had to remove their part number as well as remove the Mercedes star logo in order to keep selling their remaining stock. Free shipping in the U.S. SHIPPING ADDRESS: I can only send your item to the registered shipping address at time of payment.