Power steering/electrical problem in W211
All was well for a few days, then in the middle of driving my AC stops blowing and my power steering stops working. Turning the car off and on does nothing. Parked it for two days then started today, same thing no power steering or AC. Display said Visit Workshop and had a picture of a battery. Drove it around and after 15 minutes or so of driving, the car started beeping constantly and the display read "Stop Vehicle, Brake defective" and "Battery/Alternator Visit Workshop." Brakes were working fine.
What is the most likely cause of this issue?



