how can i fix my side door on my 308 mercedes sprinter van mwb ?

These are large heavy doors on these,would make sure you have no loose strikers on the side panel,make sure the top and lower catches are tight also and give all running gear a lubricate,the door may have dropped a little so check all catches and strikers are lined up when closing and side runners are free and lubricated also,it may just need a small adjustment,good luck.

cdc
May 2014