On my 91 190e I had that problem once in a bit of a blonde moment. Apparently the gas tank door is linked to the door locks. The doors on the car must be unlocked for the gas tank door to open. I hope your problem is as simple as this.
A Mercedes 190e doesn't have a carburetor. They are fuel injected.
Could be universal joint is finished. A bad flex disk
who give the signal in the 5th injector to start 1992 Mercedes Benz 190e 2.3
It's probably the switch.
w 201
Its on the door panel next to the door handle. at least that's where it is on my 1992 190e 2.3
Dexron II or III with Mercon.
castrol magnatex 10w 40 a3/b3
hello this cars are very sensitive for poor battery power ,pump should stop within 3-4 sec if not than maybe wires
I have a 1992 Mercedes 300E and if your car is anything like mine, the dusebox can be found beside the battery (under the hood, passenger side).
"http://wiki.answers.com/Q/Fuel_cuts_off_on_1992_mercedes_190E_2.3_liter_engine"
Locate transmission dipstick. The dipstick tube is the fill tube.