Eurocar Inc. : Hello there! I'm Eurocar ! I will try to assist you as much as I can. Quality research = Quality answer!!
Eurocar Inc. : On your Bentley you have 2 batteries. A starter battery and an electrical battery to run all of the accessories. Now there is a backup transfer setup on your car if the electrics battery gets low the switch happens and the starter battery takes over.
Eurocar Inc. : But it is not good because the capacity of the starter battery is a lot smaller than the electrics battery
Eurocar Inc. : So recommendation is to have both batteries checked out or replaced due to age of the vehicle
Eurocar Inc. : now your vehicle can be serviced at an Audi or VW dealer. Most of the parts are the same for your Bentley = Audi A8 = VW Phaeton
Eurocar Inc. : they have the same setup of electrical system
Eurocar Inc. : I would contact either brand store and ask them
Eurocar Inc. : If you need more info please ask. I'm a master tech for VW,Audi , and Bentley.
Eurocar, Do you believe low battery level could be responsible for these described issues?
Eurocar Inc. : Yes especially on the electrics battery.
Eurocar Inc. : Too bad you are not more north near Lake Erie because I would gladly service your vehicle.