Have you checked the fuel pressure yet?
Fuel pressure regulator is a fairly common fault.
The low pressure system pressure is approx. 1.5 bar to 5 bar and return end < 0.6 bar. The pressure in the high
pressure end is 200 bar to 1350 bar.
I don't have a problem with asking for different opinions but I wouldn't ask someone who's advice I'd ignored how to fit something someone else recommended.
No-one with lived experience will say that battery is overpowered for an L322 Vogue. As stated by @kermit_rr the best battery is the most powerful that fits. As everyone else has said, in one form or another, don't ask if you won't listen...
So the other 3 forums know better yet you're asking us.
Obviously not as you have ignored our recommendations. Hopefully you will prove us wrong after it's been fitted for a few months.
As above, no battery management but I see you ignored the advice and went for the smaller battery.
If you have a Vogue or one with lot's of extra's fitted the 920a may struggle a little if it's not your daily driver and/or used for short trips.
Make sure the car shuts down properly before disconnecting, have a cuppa.
Make sure you know how to put the bonnet in service mode.
Oh and dont leave the battery in the boot when you disconnect the battery 🤔. Its not a problem it just means you...