sitting at the light one night the car drop in the rear, and it at my house garage. yes I know a little, in the trade from the 80s, just buy the car

i had the alternator check and is i need to change the axillary battery

The car turns over but does not start. The car sat for a full day and I noticed gas leaking on passenger side rear, where you put gas in the car. MBenz told me that both my pumps went out (yea, at the same time). I don't believe that. Is it possible that a relay went out or the fuse on a relay went out? Is there a overflow of some type that will release gas at the rear of that vehicle in the event that to much gas is put in the car?

the whole dashboard doesn't work, the car starts and runs right but no dashboard, any ideas anyone???