needing help advice please w203 c320

[happymale]

thank in advanced for any help advice so fa have forund no answers any where her is my problem my w203 c320 the central locking problem ok the back left hand door is the only one thats wors as it should from fob the back right hand door will only unlock the two front door do not work at all from fob have to lock left hand manually befor shutting the doof the drivers ddoor have to insert the key to lock it will only lock that door the boot will open as well as the fuel flap the blinker all flash as the should and headlight come on when useing fob to unlock rear left hand door the internal btton in dash will only lock and unlock the rear left had door have done scan with icarsof mb v2.0 no code show for doors so aany information help is relly appchaited thank you michael