D - Air Restriction Indicator Light - will come on if air restriction indicator shows that air cleaner requires service.
It's not PC to use our words as we might offend someone that can't read, so we use pictures that nobody can understand.
Huh??
Instead of writing "air filter" below the dash light light they have a picture of who knows what that nobody can figure out. Why not words? Well it is not politically correct to discriminate against people that can't read a native language.
Ah-- now I get it!![]()
Well, given they sell their equipment all over the world I would imagine if they had to use words customized for each country they export to that the price would have to increase accordingly.