03 SLK320 Trouble codes

Aloha from Hawaii. I'm new on this site and I would appreciate very much if my fellow members could help me fix on the trouble codes PO422, PO432, PO442-443, PO453. I retightened my gas cap and seems to be okay. I also had my battery and alternator changed and the car stereo doesn't work. I inputed the code on several occassions and locked up, WAIT appeared on the radio screen. Mahalo.