What is it with DEF?
Just what is the Diesel Exhaust Fluid (DEF) ? What does it do and why do I need it? This is my first diesel and I never heard of it.
Forum Discussion
Gonzo42 wrote:
Then how would I know whether I am required to use it? I haven't seen anything in the manuals.
It would be in your manuals and your truck would have a separate tank for the DEF. Tell us what truck you have and someone on here will know
edit- Just looked at your previous posts. A 2007 sprinter MB diesel probably doesn't use DEF but I am not sure. Somebody else will have to chime in.
