After owning a '73 280 for 15 years (as second owner) and being able to do quite a bit of the work on it myself, I saw, drove, and bought this '97 E420 I couldn't live without. So I've moved into the world of electronics/computers and experienced my first "Check Engine Light." After looking around the web, I decided this is probably the best place to go and ask for some advice, and here I am. I suppose the best thing is to post my question in the General Tech area, so I'll do that.

 

it can be diagnosed. read the fault code.