My 5+ minute search, "X351 manual" failed to retrieve the following helpful post, which would have been retrieved by "X351 service manual". Ah, the idiosyncrasies of search!
https://www.jaguarforums.com/forum/g...-manual-86977/

The referenced fee-for-information site can be found here:
https://topix.jaguar.jlrext.com/topi...cle/lookupForm

Following registration, it appears that a 1 year subscription to a single model and year for all documents (diagnostics, bulletins, and service) would cost $433 USD, although hourly, daily, weekly, and monthly subscriptions are available for reduced fees.

I am curious if anyone knows of any alternative sources for similar documents. Thanks in advance!

 

You can get a PDF download of all the service bulletins and recalls for not many $ from here:
XJ - Service Bulletins and Recalls [Jaguar XJ XJ X351]

 

You can search for recalls by VIN for free at: Home | Safercar -- National Highway Traffic Safety Administration (NHTSA) TSB summaries are also available for free. 2013 JAGUAR XJ | Safercar | National Highway Traffic Safety Administration (NHTSA)

This is a great website - browse around. Sponsored by NHTSA - the US Government National Highway Traffic Safety Administration.