Replace heater matrix RENAULT Master II Van (07.1998 - 12.2013)

On the Master II, this is quite a task, because officially you have to remove the entire dashboard. But there's a shorter way:
Drain the antifreeze and remove the heater hoses under the hood (near the bulkhead).
Remove the lower plastic panel and unscrew the gas pedal (it's in the way of pulling the radiator to the left).
Unscrew the screws securing the pipes and the radiator itself to the heater housing.
Carefully pull the radiator toward the driver's feet. It might be difficult—the interfering plastic housing can be slightly trimmed or bent.
Remove the gas pedal, unscrew the pipes, and pull the radiator to the left.