There is no 10years / 200K specific period in the ACL. You have to refer to the highly subjective concept of reasonable durability and a reasonable expected period of service when arguing there should be assistance with a repair. Even within a normal warranty period, all manufacturers have exclusions for some parts that wear and some of the very long warranties on offer have quite surprising exclusions if you read the detail. In this case, it has not yet even been taken to a dealer to investigate the P20EE fault apparently found, so it's certainly not at the the point of pursuing ACL rights for a urea reservoir/pump. Buying a car at a discount with a problem and then expecting a goodwill repair is a bit rich in any event. However, manufacturers do sometimes provide some form of extended warranty on certain components and being a new owner may not matter.
It is worth talking to the local dealer to begin with. That fault code could be due to a number of issues, such as a leak at the injector near the engine or even a bad electrical connection. They might conclude it needs a reservoir, but maybe not. They are supposed to follow guided diagnostics in the diagnostic tool and you'd need that done to have any hope of a contribution from the manufacturer.
It is worth talking to the local dealer to begin with. That fault code could be due to a number of issues, such as a leak at the injector near the engine or even a bad electrical connection. They might conclude it needs a reservoir, but maybe not. They are supposed to follow guided diagnostics in the diagnostic tool and you'd need that done to have any hope of a contribution from the manufacturer.