NHTSA Complaint #11470964 — 2019 MERCEDES-BENZ A 220

My A220 has numerous problems starting the airbag failure light comes on very often which I took in for a repair - Mercedes of downtown stated they fixed but it still has the airbag failure light appearing every now and again. The second issue that keeps happening is what I believe is a transmission failure, the first time I bought the car I noticed it kept jolting when accelerating and or going up a hill. I was quite scared because I had a ford focus that did the same thing and would die on me all the time. This A220 has the same exact jolting as my ford focus did but does not die. I kept bringing my car into Mercedes and explaining my concern, they didn't find any issues until recently when Mercedes stated it was the "battery" after they "supposedly fixed the issue, I noticed a month went by and the car continues to have the same jolting. I am extremely terrified of driving this car at this point and need assistance in having Mercedes look into this deeper.