Here are photographs of most (if not) all factory stickers on the 500E / E500. Individual, special-model and non-US cars may have different stickers. This is from a typical US-spec 1994 model car.
Hope this helps people in their quest for the factory stickers and/or in reproducing the stickers that are no longer available.
For reference, the yellow rectangular emissions sticker, which is found on the radiator brace (core support) under the hood, IS NOT and NEVER HAS BEEN available through MB channels. This sticker is highly restricted in its availability.