435 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
c You are driving with one or more 
doors open.Stop the vehicle in a safe location or as 
soon as it is safe to do so.
Close the door(s).
] Clean
Fuel FilterContact an authorized Mercedes-Benz 
Light Truck Center.
AGas Cap OpenA loss of pressure has been 
detected in the fuel system. The 
fuel cap may not be closed 
properly or the fuel system may 
be leaky.Check the fuel cap (page 337).
If it is not closed properly:
Close the fuel cap.
If it is closed properly:
Have the fuel system checked by an 
authorized Mercedes-Benz Light Truck 
Center.
aYou are driving with the hood or 
the tailgate open.Carefully bring the vehicle to a halt as 
soon as it is safe to do so in a safe 
location.
Close the hood (page 341) or the 
tailgate (
page 119).
You are trying to lock the vehicle 
with the KEYLESS-GO* function 
with a door or the tailgate open.Close all doors and/or the tailgate 
(
page 119).