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]

 

[panjap]

I did re-charge my battery for 10 hour. Its never show parking brake release anymore. But "Front right/left malfunction" still show for 3 second then disappear.
I met my friend car which has the same model with me , he said his car activate this sign also. Only when 1st time driving on that day then disappear. Identical status with mine.
Anyway, I plan to change to new battery to see its solve or not. Will let u know again.

 

[markjay]

It's possible that in addition to the battery issue, there's also another issue (or issues). You should really get yourself an iCarsoft scanner if you want to get to the bottom of this.

 

[panjap]

My friend car is year 2013, identical with me.
Her battery is varta AGM year 2023. She got the same message as me. She went to MB dealer to check. MB dealer said sometime may its cause from wheel sensor is delicate for activity that why that error is show.
I guess this is not true because since two year ago, it has never show such warning previously. However, MB dealer said this. I guess they have no clue to solve this too.

I drive my car more generally and recharge whenever get back home. Its warning sign show less but still happen only first time driving. My battery is Bosch AGM 2022.

I scan it thru icarsoft. Unfortunately, nothing false show. However, will follow the case and let u guy know whenever it solved by any solution.