Take it to any mechanic and they can do it for you. Is the computer telling you how much to drain?
Dealers may charge you the extra money because it does take some time to warm up the car to get the proper oil level reading. Nonetheless, $150 for that is ridiculous.
2011 E92 M3 DCT
1991 Spec Miata
2008 E92 M3 DCT - KW Competition 2-way / Brembo 365 BBK / OMP ARS racing seats / rear seats delete / GT4 aero / AiM EVO4 data logger / SmartyCam racing camera
2008 E92 M3 6MT
2008 E92 335xi