Really? I thought all P85Ds before April 2015 had the P+ suspension so a February 2015 is nowhere near the cutoff. If it doesn't, wouldn't it be deceptive advertising as Tesla was still advertising the sport suspension on the configurator?
Check out this thread:
Performance Plus (+) Upgrade
The date range for the possibility of the + suspension being included in P85Ds is December, 2014 through April, 2015, inclusive.
There are known examples of P85Ds in that time period that did not get the + suspension. Some had the PX01 code ("Performance Plus Suspension"), some had PX00 ("No + suspension"), and some had neither option code. Now chances are pretty good that most cars built between December and April do have it, but it's not 100%.
Also, most P85Ds sold during that time had 21" staggered rims/tires, but some had 21" square rims, and some others even had 19" rims WITH the P+ suspension. It really was a hodge-podge of parts and configurations until May, 2015 when Tesla dropped the P+ suspension for good.
Tesla didn't advertise the Performance Plus suspension on the P85D configurator like they did for the P85+, it was just a "specially designed suspension" for a short period of time (thanks to
@whitex for this image). But that's also during the time they were advertising the P85D with 691 HP which was later proven to be false and withdrawn. So just because Tesla advertises something, doesn't mean it's true.