I am now having few problems with my 94' C Class W202. Can anyone help me here?

1) ABS indicator light is on even after I have replaced the ABS sensor as told by workshop, they expect the ABS ECU board to be faulty... do you think this is the problem?

2) Aircon not cool sometimes but when i restarted the engine, then OK. A/C compressor replaced two days ago but problem still persist. Could it be the problem of cooling coil?

3) Sometimes NO Air or A/C come out from the centre,only from the sides when accelerating. When accelerator was released, air started to flow.

4)Engine jerk pretty hard when gear is shift to D or R and the car started to shake pretty much, engine become not stable.. and stop sometimes

5) The reverse gear seems to reponse very slowly. It will take the car to start reversing only in 3-4 seconds when gear is in R.

6)Noisy sound from gear knob when the car is accelerating, the gear is loose when feel.

7)The brake light from the right tail light seems to be dimmer compare to the right. Replace with several bulbs but still the same.