Should I go ahead and get the air professional removed from my cooling system?

Question

After replacing the expansion tank (again) and thermostat, the leaking and overheating of my 2005 BMW X3 seems to have stopped. I have bled the air for a good 30 minutes. I made sure no bubbles was coming out. My friend who runs a shop, recommended that I have it professionally removed of air in the cooling system. Is this necessary considering I don't see signs of overheating and or really anything that could be wrong. Everything is back to normal before it became an issue. Would that mean I got most, if not all of the air or is it better to be on the safe side? It was estimated to be about $70. In no way shape or form is it a big deal but thought I'd get more opinions.

Update:

Thanks! Almost forgot :")

thebax2006 · Accepted Answer

Some vehicles like Nissan's ans Infiniti's are impossible to get the air out of the cooling system unless a vacuum fill tool such as an "Airlift" tool is used to fill the cooling system. 
If you run the heat on the hottest setting with the airflow set to the center vents feel the temperature of the air coming out of the center vents while the car is moving and then check it when the car sits for a minute at a stop sign. If the air remains hot you should be okay, if the temperature of the air drops and gets luke warm you still have air in the cooling system.

Anonymous · Answer

Don't you hate it when a pro gets stuck under the hood? Pay the $70 & have the professional removed.

? · Answer

Find a new "friend".  This one is trying to rip you off!

Anonymous · Answer

If your car is NOT overheating and there is NO LEAK, your car is fixed.

Anonymous · Answer

If you don't have an overheating problem I would assume the problem has been fixed. Keep an eye on it as the temperatures get warmer.

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Should I go ahead and get the air professional removed from my cooling system?

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