Hey guys, I know y'all have heard this one a thousand times, but I've been smelling diesel for the past couple days but didn't see any drips underneath. Today I took her to the carwash and cleaned the engine real good. I drove her another 30 miles and decided to pop the hood and I found a "diesel smelling substance" on the top of the passenger side battery. It came from the overflow bottle. The bottle is full and it has on top what looks like green coolant, but it is obviously fuel.

First question...Is this an obvious leaking injector cup?

Second question...If so, what all should I replace while I'm in there and how much should I expect to pay a non-stealership to fix her?

Third question...Will I hurt her if I drive for a day or two short distance?

Thanks