Hi all, I have just looked online to buy a diesel fuel filter for my 2006 CLS 320CDI and found there are two available. One with a water sensor coupling and one without. As I don't have the car with me today, I am wondering which one my car has - or could have? Could I buy the one with the water sensor, even if my car doesn't have the wiring in the hope it a) fits and b) would, I assume, have some sort of water separator inbuilt which the other one doesn't? Or do I just need to wait until I get back to my car and have a look, again assuming I can see which one I need from simply removing the engine cover? Thanks!