I have had some problems with the abs/esp lights coming on, but the car was running fine...until yesterday. The breakpaddel startet to vibrate and a strange sound came from the front left tier/ break ( I think). Even after shutting off the engine i could here this sound.

I drove the car home and parked it. This morning i went out to start it again, but then the battery was flat. The radio system displayed a "voltage too low" message.

have any of you experinced anything similar or know what the problem is?

Thanks in advance!