0+ (Unillustrated Parts)  
1+ Heater matrix  
2+ .Inlet pipe  
3+ .Outlet pipe  
4+ .Gasket  
5+ .Seal  
6+ .Screw  
7+ Water temperature switch  
8+ Air conditioning evaporator  
9+ Expansion valve  

The part numbers in the assembly image below relate to the product number in the table. Clicking on the part number will open up the relevant part details.