How to change heat exchanger / heater matrix on Seat Leon ST or Golf or Octavia ft. VAG cars

Hello!
It's cold outside in your car doesn't have heating?
Your heat exchanger/heater matrix is probably blocked/clogged.
You will see how i did it and what tolls did i need for this job.
The video is expanded, that you can see a lot details, on what you need to watch out.

I changed it on my Seat Leon ST FR 2.0 TDI 2016.
The same process is on almost all VW group cars.

Timestamps:
00:00 problem explanation
01:20 what you will need
02:53 lift the car and remove plastics
03:30 drain the fluid from the car
05:16 let's go inside
06:46 do you have a airbag by feet?
09:02 removal of heat exchanger/heater matrix
14:13 it is flowing thru?
16:55 assembly
17:39 watch out
18:19 O-rings replacement
26:12 tapin more coolant if necessary

Thanks for watching!