Yes!! All modern cars have to be vacuum filled. Its standard coolant maintenance.
If you have a descent size compressor, get yourself one of these:
Airlift Cooling System Leak Checker and Airlock Purge Tool Kit
http://www.amazon.com/gp/product/B0002SRH5G/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1
In the S197, there is no way for air to work itself out since the coolant system is self contained. Its not like the old school coolant systems that you just fill, run the motor, and add fluid until its full.
These systems need to be vacuumed, check for leaks (under vacuum), then configure the system to suck up all the coolant as you release the vacuum valve. After a couple of heat cycles, re-fill the reservoir as needed.