You can get the air out by squeezing the top and bottom hoses to "burp" the air out.

Everyone says you should use the official orange MB coolant.

__________________
Semibodacious Transmogrifications a Specialty

1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)

"Time flies like and arrow, yet fruit flies like a banana"
---Marx (Groucho)