superb mk3 flap motor problems

Hello,

I recently bought a 2015 Skoda Superb Mk3.

I noticed several issues, but primarily I’d like to sort out the cabin heating.

The situation is as follows: the cabin heater blows slightly warm air for the driver at maximum temperature, but completely cold air for the passenger.

I checked the cabin heater core, and both of its hoses are hot, because at first I suspected the heater core might be clogged.

But now it looks like one of the flap motors has failed.

What’s the best way to figure out which of the motors is faulty? From what I understand based on some Google diagrams, there are 3 or 4 of them under the dashboard.

I couldn’t find an exact Mk3 Superb diagram online, maybe someone could share one. The car is left-hand drive.

P.S. Maybe someone can also explain why the seat memory isn’t working?