the info says B8 or B10 but the 300 to Haarlem leaves from D8 across from airport. As we just rode it out to Hasrlem.
the 300 has been running as long as I can remember - 15 or 20 years...
That is our experience also. 300 to the train station in Haarlem.
I guess that the OP is trying to say this: The 300 bus from Schiphol to Haarlem doesn’t leave from platform B8 or B10 as written somewhere (RS guide book?), but rather from platform D8.
thanks for the translation