Correction
On the serial comma in a list of drivetrains in our BMW X5 coverage.
An earlier version of our BMW X5 coverage listed the drivetrains as "combustion, diesel, plug-in hybrid, and hydrogen." AP style closes a simple series without the comma before the conjunction: plug-in hybrid and hydrogen. The word and already ends the list; the comma set before it repeats work the conjunction had done. It was not ours to add. The record is corrected.