Striker- I utterly hate LEXOL and wouldn`t use it on *anything* these days, not even my dog leashes much less a vehicle
Most people don`t want to bother with the hassle, but on my S8 (the leather interior I really care about), I use stuff from The Leather Doctor. But for the most part I just use Interior QDs and I hardly ever "treat" leather, not for years on end with the possible exception of the dog-hauling Tahoe . But that`s just me...the trick with the Recaros will probably be avoiding creasing/wear on the bolsters and I`m not of much help with that as "patina from honest use" doesn`t really bother me and IME modern auto leather hardly ever wears out/needs repair work as long as you just keep it clean. The S8 doesn`t show such wear yet (basically never drive it, as with yours) and/but I dunno if I`ll care if/when it does.
If you use an APC, be sure it doesn`t leave things alkaline as leather does best when left slightly acidic. I`ve never needed to use such stuff on seats except for new-to-me used vehicles; if my leather does get too soiled for an IQD I use some Leather Cleaner (Leather Doctor/Leather Masters/Sonus..all OK, prefer the Leather Doctor stuff).
As rlmccarty2000 pointed out, most leather is coated and nothing will really penetrate the coating very well until it wears. Once that`s happened you can get product to penetrate via the microfissures/etc. and in some of the rare cases where I did treat dry/stiff leather my experiences in that regard have been totally opposite of the Conventional Wisdom- product penetrated readily, made a *HUGE* difference , worked great even though people said it wouldn`t happen because of the coating.
If you con`t do a Decontamination, then it might benefit from claying. If you *do* decontaminate it, I`d be very surprised if a new vehicle also needed the clay. Most people like the ClayMagic stuff (these days I just use Sonus SFX to "clay my LSP clean" as that`s all my vehicles ever seem to need. SFX is too gentle for "real decon" work).