I have a leak in my 1985 380SL AC system; The AC looses charge after about 1 week. I took it to my mechanic and he tells me that it would cost about $1500 to replace the compressor and the dryer.

I hesitate to put this much money into the car, even though it's in pristene condition otherwise. The though occurs to me that, since the South Carolina heat is almost over, I could take on the project myself with a lot of time to complete.

First question: What is the best way to check for leaks? I have the system converted to 134A. My initial research indicates that I could purchase a heated diode sniffer for around $200. My mechanic, who I trust, tells me the compressor is leaking. However, other parts of the system may also be at fault in a 22 year old car. Before I undertake the project, I wan't to have some idea about its scope.

Second question: If I were to take on this project, would I be saving much $$?

Any suggestions and commets would be greatly appreciated.