Heater core, function - GF83.20-P-2101-01A
WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.
Function
The heated coolant flows through the heater core. The aluminum tube banks and louvers pass the heat to the outside.
This heats up the air flowing through and exiting through the various defroster, ventilation and heating nozzles in the passenger compartment.