Door handle problems

[Merc mat]

Hi as any one got any advice on car door on a 2012 e class ,my rear passenger door won't open it feels like it not connected some were, it can be opened from inside , any help would be appreciated

 

[brianbrian]

Take the door card of, And check the vaccumm

 

[Merc mat]

All sorted now , I took door card off pushed the handle lock part up , pressed central locking and it click back in to place , thanks