Smart doesn’t go straight

Hello again! As the title already says, my car doesn’t go straight. With straight steering wheel position the car pulls quite clearly to the left. In order to drive a straight track I have to correct the steering wheel position to the right. But also then the car does not drive straight on by itself, instead a constant counter steering is necessary. Also with the corrected steering wheel position to the right the vehicle pulls to the right. I try to correct the handlebar a little bit to the left, there are two results: Either, I correct too strongly to the left, so that the car then drives to the left, or I correct too weakly to the left – then it pulls back the car back to the right. I hope I could express this somewhat intelligibly. My guess were the tyres and/or adjusted track. Since the tires were due anyway, I had to pull new tires on it and let the axle measurement be carried out immediately. According to the mechanic, the car actually pulled something to the right and this should be fixed now. Result: Since the tires are now new and the problem was not completely over with the old tires, I should not be able to stop the wheel source.