I have a problem with the rear tailgate posts lights not working, cannot find the switch that activates these two sets of lights, is it possible the switch is in the overhead panel at the hydraulic system area right over the tailgate? If a person wants to clean the injectors without removing them, can this be done sucessfully be putting on a new main filter, filling it with injector cleaner, installing the filter and starting and running the engine at a fast speed until the cleaner has been burned up and hopefully cleaned the injectors. A mercedes machanic told me about this method, he uses it as a yearly maintaince thing. I would appreciate any and all h----e----l----p I can get on this. Heeellllpppp

 

I don't know about the tailgate. If someone had a diagram, that would be helpful.

Do you mean you fill up the fuel filter with injector cleaner before installing it? If yes, it sounds like a hassle to me. You want to put the cleaner in a full tank so it mixes with the gas. Put the cleaner in first, then fill it up so it mixes. I don't know if the engine will run well on pure injector cleaner.