Or just look if you have a black plastic "frame" around the mirror glass (it's a single part)
like this one: Spiegelglas beheizt weitwinkel links - Elektrochrom - BMW X5 E53 - Bmw Teile - Bmwrecambios

You may also check which options your car has by decoding your VIN (the last 7 digits) here: bimmer.work : VIN Decoder for BMW