Spark plug change at W12

Hello! I came to this forum because I'm looking for information on the following question:

I have an A8L D2 with a W12 engine. I would like to change the candles, but I am not quite sure what needs to be dismantled in detail. which seals besides the central seal of the suction bridge I still have to get with the friendly.

For me it looks like this: Unlock the mounting screws of the A. bridge. Decompose air filter box. Direction of the spray wall is a hose per side, which can be pulled off and next to it a screwed flange (whatever that may be for a part). I'd unscrew it, too. Then the suction bridge would have to be lifted.

OR is it necessary to disassemble the A. bridge - which consists of three parts - so that the side parts are separated from the middle part? Then you'd need new seals.

How big is the tightening torque of the screws of the A. bridge during reinstallation? In Alu quite important.

Does anyone even have a maintenance manual for the engine? Although I have the corresponding DVD from Audi ELSA 3.3 , but unfortunately the .EXE is not running. If anyone's interested.

I hope that the many questions are not too insolent as a pretence...

Thanks for the answers says
Marc