'92 300 D 2.5

What is the total refrigerant oil quantity to be added to this vehicle if every... literally... component of the A/C system has been renewed? 120 cc?

It's 8 ounces for a dry system, per the manual. This is pretty much the norm for any Nippondenso compressor. That's closer to 200cc, per my handy-dandy metric-SAE calculator.

- JimY

Jim - which manual are you referring to? The M-B Tech Data Book?

I don't have a copy handy, but if I recall correctly, it lists the following for the 124:


a)Total filling capacity, new in compressor - 120 cc


Additional capacity during replacement of the following:

b) Evaporator - 40 cc

c) Condenser - 20 cc

d) R/D - 10 cc

e) Intake line - 10 cc

f) Delivery line - 10 cc

If taken together, they total 210 cc... approx 8 oz.


But here is where I'm confused.... does the first item [a) Total filling capacity, new in compressor] represent the total filling for the ENTIRE system.... or just for a new compressor when no oil is successfully drained from the old compressor?


Thanks for the help.

No, my info is from the 124 chassis heating and airconditioning manual. I don't have it handy now, but I recall it rather plainly states the total capacity of a dry system is 8oz. It lists the quantity of oil to add when replacing individual components under the job number for replacement of that component.

- JimY