Mers. E320 i got P0743, P0753, P0763 and P0758 codes,what part I must changed?

P0743--- Your vechicle is probably in limp mode because of the error. I would look at the solenoid for the torque converter make sure the o-ring has not slipped off its groove needs to be properly seated to read correctly at the eletrical connection. Have to open pan to get to it. Probably replace the solenoid. The rest of the codes are all related to the shift solenoid a and b electrical which could be related to the first code or a eletrical harness has separated or failed. I would say replace the torque converter solenoid and then get codes cleared at a trans. shop and see if this takes care of it.