I think my fuel tank is dirty how do i clean my hole syterm ?

First, did you also change the secondary filter on the engine? Here's a post that shows its location (for turbo engine, but yours probably similar): https://www.benzworld.org/forums/w124-e-ce-d-td-class/1419818-1995-e300-diesel-fuel-filters.html
Also check the filter that you cleaned again -- if it's dirty, that means rust or debris from the fuel tank or fuel line is coming loose.
If you can access the fuel pump (usually inside the gas tank), they often have a flexible mesh filter to catch big stuff that can be removed and cleaned (or replaced, if there are holes in it).
But if the problem recurs, you'll probably need to remove the fuel tank and get it "boiled" to remove the rust and other stuff. And you might as well replace the fuel line, while you're at it.
Finally, a bunch of gunk in the gas tank can definitely shorten the life of the fuel pump, especially if the mesh filter wasn't capturing all the debris.

Do you have any warning lights on your dashboard? A warning light will indicate whether a sensor is faulty - and there are many sensors which control fuel/air and throttle position, including an oxygen sensor on the catalytic converter.

If there are no warning lights on your dashboard start with the the things that are easy to check and you can fix yourself, cheaply.

Check the condition of your air filter. A dirty or clogged air filter causes the car to run rich - just like driving with the choke on. It doesn't cause you just to use more fuel - it also makes the car sluggish.

A vacuum in the fuel tank can 'hold back' the fuel and make the fuel pump struggle to supply fuel up to the engine. The usual cause of a vacuum in the fuel tank is a blocked breather tube that runs from the tank to atmosphere - it can get clogged by road dirt thrown up from the wheel.

If there's no breather tube, air is allowed into the tank via a small hole in the rubber seal on the fuel cap. If the seal perishes or becomes dirty that breather hole can become blocked.

A very quick check is to simply remove the fuel filler cap and take the car for a drive. Has it made any difference?

The fuel pump itself (it is usually located in the fuel tank) may be failing and is unable to supply fuel at sufficient pressure. The fuel filter may also need changing.

The EGR (exhaust gas recycler) valve may need cleaning (or replacing).

Do the simple - and cheap - things yourself. Check air filter.. vacuum in fuel tank.

Some sound advice is not to change component after component in the hope that it will cure the problem. Give a mobile mechanic a call - these guys are usually very good and cheaper than a workshop. It'll save you money in the longer run

disconnect all fuel lines to the tank, vacuum hoses to tank and electrical connections at tank, fuel filler hose from gas cap. support the fuel tank and undo the tank straps then lower the fuel tank(it will be heavy). clean surface of tank from dirty then undo the locking ring that holds the tank unit to the tank and remove the unit. I think on this model of truck the complete unit gets changed not just the pump. assembly in reverse.

Dude lot of work but drop the tank clean it out don't forget to clean the fuel pump out and new filters new fuel and keek it jumped to another car until she starts ,just did same for hj holden but I had too replace take as it is a metal tank and it rusted out, if you have time let water soak in tank once out for about 12hours then rinse and dry completely by standing for 12hours all holes open good luck

no way i know of to clean it out without removing but replacing fuel filters when they become clogged cold resolve if thier isnt too much in the tank

you may have dirt in the fuel tank that has come loose after using the cleaner.you may have to have the fuel tank removed and cleaned as well as the fuel lines flushed out(blown out) to get all the dirt out of the system.when filling the tank you have induced fresh clean fuel that is pumped through the system before the level gets low enough that it starts pumping the dirt in the bottom of the tank,the fuel filter is located under the car on the passenger side along the frame rail ahead of the fuel tank.it is round in shape and about 3.5"long.you may need the injectors cleaned in case dirt has gotten that far.

IF CAR TURN OVER NOT CRANKING AFTER A SHORT DRIVE WHEN ENGINE HOT.DIRTY CLOGGED FUEL INJECTORS FLOODING ENGINE OUT.CLEAN FUEL INJECTORS.FILL GAS TANK UP.PUT A CAN OF SEAFOAM IN FUEL TANK.DRIVE CAR AROUND TO HELP FLUSH OUT CARBON ON THE INJECTORS SEATS TO STOP GAS DRIPPING CAUSING FLOODING.IF CAR WONT TURN OVER.BAD BATTERY CABLES OR STARTER.SCAN IT FOR THEFT SECURITY PROBLEMS. IF STARTER TURNS OVER NO CRANK ENGINE FLOODING DUE TO DIRTY FUEL INJECTORS.

Try buying a cople of bottles of wynns fuel cleaner from halfords let youre fuel get realy low then add both bottles to youre fuel tank and fill youre tank up just over halfway with bp ultimate then drive as normal this should clean youre fuel syterm if the power comes back its dirty valves and piston heads and you ether need a stripdown and decoke of if youre lucky you can repeat my tips about three times and it should clean youre sytem hope this helps

FLOODING IS WHAT HAPPENING.CLOGGED OR DIRTY FUEL INJECTORS. IS LEAKING WITH ENGINE OFF.FILL FUEL TANK.PUT A BOTTLE OF FUEL INJECTOR CLEANER IN FUEL TANK.DRIVE AROUND SO THE FUEL INJECTOR CLEANER CAN CLEAN FUEL INJECTORS.

If the car has over 100,000 miles on it, you may need to replace the distributer. I don't think the bad gas caused this issue I think it may just be a coincdence. But if you already changed the plugs, wires, distributor cap, and rotor, I would definetly check the distributor.