Hello, With all those systems malfunctioning at once. I don't think it is an issue of resetting anything. Seems like a power supply problem, like you already said possibly the alternator. When these systems see low power supply the set codes and start cutting back on power. For instance you car knows the charging system has a problem, it will not turn on the A/C. I think you need to get to a shop to have the charging system checked for low output or possible excessive ac current. You really need to know what codes are being set in all of the involved areas to really narrow down the problem (everything can't go bad at once). I don't know if this will do anything but you might want to try leaving the battery disconnected overnight to power down the systems and then reconnect it in the morning and see if anything starts working (like rebooting your PC). Good luck, Nick
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ASE Certified Technician
Over 25 years of experience in automotive computer systems. ASE L1 Cerfification
Hello, I deal with a company called worldpac. They say the Bosch reman AL0703X 120 amp for part # 12 31 7 519 620 is $490.66 list and cost $168.85. If you know a shop who uses this company you should be able to get it under $500.00. Hope this helps
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Just a reminder to hit accept if the information was helpful. Thanks, Nick