Open and close coupling - AR09.41-P-1311-01AL

Open 

1. Slide nose (2) of catch spring (3) to position (B).

   Do not pull on the eyelet (1) as the catch spring (3) will lose pretension.

2. Detach hose on component.
3. Replace seal.

   Close 

4. Slide nose (2) of catch spring (3) to position (A).
5. Slide hose onto component until the catch spring (3) latches.
6. Check connection by pulling slightly.
   Fig 1: Identifying Open And Close Coupling Position

   Courtesy of MERCEDES-BENZ USA