How do I drain the fuel tank on my 1987 Mercedes 300d turbo sedan?

Disconnect the fuel line from the fuel rail and put a piece of hose on the line and put the other end in a container then locate and jumper the fuel pump relay (jumper from terminal #30 to #87 or whatever number is highest) this will pump the tank dry, then add a gallon if gas and pump that out as well. This shold take about an hour. This will work best if the fuel tank is warm as diesel thickens when cold. I hope this helps. Take care.

check primary fuel filter for diesel.If none take hose and blow back to tank.You should hear air bubbling. then try letting pump pick up fuel.You could have a clogged screen in the tank.

Heres some specs you mights also want if not oh well...just a bit extra

22 gallon main unleaded fuel tank

- Auxiliary oil cooler - 4,195 cc
4.2 liters in-line 6 front engine with 93 mm bore,
102 mm stroke,
10.3 compression ratio, double overhead cam,
variable valve timing/camshaft and four valves per cylinder LL8 - Unleaded fuel 87 -
Fuel economy EPA highway (mpg): 21 and EPA city (mpg):
15 - Multi-point injection fuel system -
Power: 217 kW , 291 HP SAE @ 6,000 rpm; 277 ft lb , 376 Nm @ 4,800 rpm

I would check www.car-part.com. You enter the year, make and model, part, and your zip code and they will direct you to salvage yards in your area that may have one available.

do not worry about draining it, pour about 6 to 8 ounces of engine oil in it, and top it up with fresh fuel, it will be fine. The only way to drain the tank is to remove it and turn it over.

never mind the fancy stuff ,is it pumping fuel when you slacken off the injectors

85 octane is all you need unless you are at sea level then use 87 octane...

You have to drain the fuel tank and disconnect fuel lines and blow out with compressed air. The fuel pump is in the tank take it out and spray down with WD-40. If you run the car with unlead gas it will damage the motor.

You have to drain you fuel tank completely, and refill with diesel only.
Hopefully it didn't already cause too much damage to the glow plugs and engine in general.

The waste gate is on the turbo....the can with a hose on it. The "regulator" on a 300d is in the diesel pump