How do you change heater matrix on Mercedes C250 diesel?

To change the heater matrix on a Mercedes C250 diesel, you typically need to start by removing the dashboard and associated trim panels for access. Then, disconnect the coolant hoses from the heater matrix and remove any screws or bolts securing it in place. Replace the old heater matrix with the new one, reconnect the hoses, and reassemble the dashboard. Finally, refill the coolant and check for any leaks before testing the heating system.