ABS/ESP , Air bag warning (W204 C180 M274 engine)

[panjap]

I own MB C180, M274 year 2013. In last couple month I had this warning sometime when start the car and run for 500 meter. It has Front airbag light or Passenger airbag light ramdomly . Or Currently unavailable (I change ABS sensor 4 year ago) or Release parking brake.(even I didn't using parking brake)

But the car can drive normally until lately couple day an air-condition is out of work I guess and electric is out from the car because I heard CCTV in the car restart itself.
However after drive for a 500 meter, all of it disappear and work perfectly. Aircon work as normal and all warning disappear. Those event may happen randomly when park again.

Does anyone get this warning like this. And how to solve it. I run Icarsoft diagnose but found nothing. I clean all sensor below my seat using contact cleaner already. My battery is AGM 3 years old. UB= 12.0 V (and increase after start the car) and after alternator work = 14.8 V. Do you think I need to replace a battery?

Regards.,

 

[SpikyMikey]

If your "resting" voltage shows 12V, that suggests that you have a battery problem.
Have you tried trickle charging it and then checking to see if it is holding that charge?

 

[panjap]

If your "resting" voltage shows 12V, that suggests that you have a battery problem.
Have you tried trickle charging it and then checking to see if it is holding that charge?

OH , yes, I check by press Call out button and press OK button, its show 12 V but never drop more than that. I guess battery may not function properly.

The reason support this is , it happen only when first start from my house. Between the day, it work fine, no any alert message. And if I park for couple day, sometimes alert showing.

So, base on your suggestion, its possible that when first start, voltage is not enough that why it show alert. After that alternator work properly and charge to battery then it show nothing.

I guess I will fully charge its one time and watch. If it solved, will let you know. Thank for your comment.

 

[SpikyMikey]