thank you for letting me join hoppeing some boady can help me i have a w203 c320 2004 with a big problem with central locking her is my problem

the two front door will not lock nor unlock the back left hand door will lock and unlock the back right hand side door will only unlock the boot will open the petrol flap will lock and unlock the lock and unlock button in the dash will only lock and unlock the back left hand door the blinker light work when i use the fob when i use the key it will only lock the drivers door thank you in advance