I'm currently rebuilding the air conditioning system in my 1980 W116 300SD. I'm converting it from automatic climate control to manual with parts from an early W116. I will be using refrigerant R-12, a Sanden compressor, a parallel-flow condenser, and a 16" fan from a second generation W126.

I will also be making new hoses and even though I am going to still be using an expansion valve and receiver drier, would adding an accumulator be a good idea in order to protect the compressor in the event that liquid refrigerant should inadvertently reach it? Or is this overkill and unnecessary?

I really don't want to add one, but I wonder that if by NOT adding one, I'm gambling with the life of my new polished aluminum compressor.

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1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles