This was discussed in other thread, but the question is which statements by Elon (which many consumers may not have heard or seen anyways, even as a quote) constitute a verbal contract for Tesla to deliver to individual buyers, versus just another forward looking statement (which may have consequences with investors and SEC, but typically not with the individual buyers). There's probably a few other talks that Elon mentioned L5 if you dig (although it's not always clear which definition he is using), but the audience it was for was not the car buyers.
I do know however, there are more concrete written things on the order page regarding FSD, but none of that rises to L5 level. The most that was promised was during the 2016 launch, with features that would require L4 to accomplish ("no action required by person in driver's seat"), but actually would
explicitly not be L5 due to the wording "full self-driving in
almost all circumstances".
https://cdn.motor1.com/images/mgl/6B9KE/s1/enhanced-autopilot-self-driving-tesla-autopilot-cost.jpg
L5, no matter if you use the NHTSA definition or the SAE one, must be able to drive the car in all circumstances/conditions, not just a subset ("almost all" is not L5).
NHTSA: "An automated driving system (ADS) on the vehicle can do all the driving
in all circumstances."
Automated Vehicles for Safety | NHTSA
SAE: "The feature can drive the vehicle
under all conditions." "same as level 4, but feature can
drive everywhere in all conditions"
SAE Levels of Driving Automation™ Refined for Clarity and International Audience - SAE Levels of Driving Automation™ Refined for Clarity and International Audience