The two tags mentioned are for manual-roof versions and are not present on the powered-roof version. The handbook is potentially confusing as it shows both versions one after the other, so you have to be careful you're reading the right pages. The manual roof has a number of electric devices to lock it - operated by the two switches behind the driver's seat - so it seems the same as the powered roof version, but it is not.
On the powered roof version, the two switches are covered by a blanking plate. They operate when the ignition key is on - no need to have the engine running. I believe the reason for the blanking plate is because using the switches behind the seat can 'confuse' the hood ECU into not knowing where the hood is, and therefore, it won't do anything when you use the switch by the handbrake. I assume this is the situation you're in now.
The switch nearest the door (i.e. the outer switch) operates the motors that lock the back edge of the hood down onto the cover.
The switch furthest from the door (the inner switch) operates the central motor to lock the cover down.
The roof itself can be moved manually. If you are trying to close it, first ensure that the cover is locked down (try lifting the front corners). If not, unlock the back edge of the hood from the cover, raise the back edge of the hood (perhaps use a broom handle to prop it up out of the way), and then try locking the cover down. Remove the carpet trim of the compartment behind the seats and observe the motor and cables - do they move? Are they loose or detached? If so, lift the hood cover to give access to the catches. They are spring-loaded but will not latch down until the motor pulls the cables. This motor is a well-known failure and since you mentioned the "hammer technique", I guess you know about it.
Once the cover is locked down, then you can lock the back edge of the hood down onto the cover. You have to press down on the part below the plastic window (or have an assistant press down) while you operate the outer switch.
The switch by the handbrake will do nothing unless the position of the hood and the locked status of the cover and back edge matches what the ECU expects. So, once your hood is locked as described above, turn the ignition off and on, and you might be pleasantly surprised to find the switch by the handbrake now functions correctly.
If not, open the hood manually: unfasten the catches, unlock the back edge, lift the back edge, unlock the cover, fold the hood away, lock the cover. Ignition off and on again, and then try using the switch by the handbrake to close the hood.
Once the hood is back 'in sync' with the hood ECU, there's no need to use the switches behind the seat.
Remember the sequence for hood closing:
- hood cover raised
- hood unfolded out to windscreen
- front clasps latched to windscreen
- back edge of hood raised
- hood cover locked down
- back edge of hood locked down onto hood cover
- windows up
I suspect that what has happened is that your hood cover isn't locked down, and therefore, the back edge won't lock down.
I'm sure you'll sort it out though!