All,
I don't have any experience with AC systems so looking for some guidance. the AC will work for maybe 3 minutes after a restart, then blows ambient air temp. It is pretty consistent and will fire up for another 3 minutes after every restart.

I had it charged at an MB dealer 3 years ago and the car doesn't get driven much. Think it's low on refrigerant? Any way for me to check without the special tools?
Thanks,
Todd
99 C43 w/80k miles, in South Florida