1995 E 320, automatic, Air in system?
 

I have been reading a lot about burping and bleeding of air from the cooling system. I am curious, how can you be sure there is air in the system? How do you tell how much? How do you bleed it (properly)? and How do you know you got it all out?

Have checked the archives and other posts, but the answers only make me have more questions. Can someone please explain proper proceedure and how to tell if it needs to be done. Have a feeling that others may be asking same question.

Thanks,

The M104 is self-bleeding through the design of the cooling system. Top the overflow tank all the way up and let the car run. This usually takes care of it as the air will be allowed to work itself out of the system. There would only be a reason for for to become trapped in the system if the coolant was changed and the system not bled properly through the method I just described.

Run your heater on high for a few minutes if you get full heat you have probably removed all the air.