Vehicle is a 2019 Mercedes Sprinter 3500 3.0L 6 Cyl OM642 Winnebago Navion.
Concerned about the age of existing DEF fluid in the vehicle especially since we are based in Florida with elevated temperatures. Would like to extract the fluid currently in the tank and replace with fresh DEF. I have read every post I can find on this subject and am unable to locate any definitive procedure for doing this on the subject vehicle. Of course, Mother Benz manuals are silent on this subject as it is on so many other points of interest.
The DEF tank appears to be located behind the right headlight assembly and very difficult to access.
Hoping to obtain suggestions/ideas/comments from members of this forum who have more experience with the vehicle.
ALL inputs WELCOME,