Originally Posted by
WhiskeyBravo
AF and KL super deep discount buckets now book or "map" into DL Basic Economy. You will not get main cabin benefits. Even if your fare bucket isn't "E" if you try and get any main-cabin benefits by calling DL and asking, they'll just tell you you're in basic economy.
Not sure if this is true - I've never had an issue getting PM benefits (seats, upgrades) on these types of tickets when a flight is DL coded and non-E fare class. I do think trying to make changes would not be allowed.