It isnot the full heater case / housing. Part numbers.
Mercedes W163 400CDI diesel pipes pipe Diesel T-piece metal
Mercedes W163 400CDI Diesel T-piece Metal Diesel Pipe
98-05 Mercedes W163 ML350 CLK320 C320 Engine Motor Fan Blade 1122000123 OEM
02-05 Mercedes W163 ML320 ML500 Steering Angle Sensor OEM 163 460 00 90
Fuel Injection Throttle Body Housing OEM Bosch For Mercedes W163 W164 R171 C230
FRAME VENTILATION VENTS STAINLESS STEEL CHROME MERCEDES W163 ML