600SEL (140.057) V12-6.0L (120.980) (1993)
Heater Core: Service and Repair
Remove and Install Heat Exchanger
Air conditioning unit
Remove. See: Heating and Air Conditioning/Housing Assembly HVAC/Service and Repair
Clamps (arrows)
Unclip.
Screws (21)
Unscrew and remove.
Heat exchanger (22)
Pull out upwards.
Pipes on heat exchanger
Disconnect and fit onto new heat exchanger using new O-rings; to do this, unscrew screws (23).
Heater unit
Clean out inside and remove any leaked coolant.
Install
In the reverse sequence.