2010 XFR Noises When Cold.
 

Jaguar XFR with 33,000 miles.
Should I be concerned over the slight rattling noise that occurs when the engine first starts? It diminishes as the engine warms up. Is there a timing chain tensioner of something else that I need to look at to avoid a potential major failure. Its the first year for this supercharged 5 liter and I can't find anyone locally with any experience with this engine.

Thanks,