@gerryvz Looking at cars on BaT many '92s have the yellow emissions sticker, but it looks like those are for cars conforming to CA emissions.
This statement is model dependent. And the following statements apply ONLY to North America E500E models only, NOT “Yurro” models.
For the E500E, if the car has a CHECK ENGINE light, it’s going to have a yellow sticker. If it doesn’t have a CEL, it will have a black sticker.
This switchover was made sometime in the early to mid 1992 model year production period, on the E500E.
This means that MOST 1992 E500Es will have yellow stickers. At least half if probably 3/4 of them.
Also note, ALL E500Es brought into the US — regardless of model year or sticker color or whether a CEL is present — were California emissions compliant. 100% of them.
This was an MBNA planning decision, to only provide one model rather than a CA emissions model and a “49-state” model like they had previously with many other models. It was also recognition that California would also likely be the single largest state market for the E500E, which was a correct assumption. It made most sense to just get a single model approved, emissions-wise, for the entire US.
I can’t talk to other models so much.
My 1989 560SEC, which is a non-California (“49-state”) model originally sold in New York, has a CEL, but also has a black sticker.
