1990 mercedes 190e wont start, new battery, new fuel filter help

needs tune up -fuel filter (its external)--fuel pump-check crank sensor /cam sensor --egr valve -cat converter

run the fault codes first and if no faults then use the code reader to reset the CPU as the program may be corrupted.

did you replace your filter and blow out your injectors

there are 2 fuel pump relays on the mercedes so it is unlikly that they have both gone on it....check your over voltage relaytell me what happens
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what is the fuel pressure reading, bet it's zero. replace the fuel pump and the fuel filter. when fuel gets old it gums up the pump and it won't spin and produce pressure, very common complaint on stored cars, i.e. no fuel pressure.

When a vehicle has been left for a long time without being started it will need the following: New fuel, New battery, change of engine oil, possibly transmission oil and brake fluid as well. All fluids in the engine will tend to settle and separate out over time if left. Ideally you start the engine weekly if you put a car aside.

hello,good day,seems your steering lock mechanism is defective,or you can try to rotate your key, with patient ,maybe it turn,but you need to replaced the mechanism,ty

hi,best thing to do,install a pressure gauge,you can see the pressure of fuel while starting your engine,maybe one of this is defect, fuel filter,fuel pump motor and fuel accumulator,also check your rubber seal on injector,you can check your spray pattern of injector before replacing,ty

Ok there is a number of things that will stop it from revving past 3k from your description I would check the ignition timing for advance mechanical and vacuum .I don't know when you experience the fault or eg while driving or just free reviving in Neutral .
BTW 190e does not have limp home mode so there is a real problem. Hope this helps

have you tried replacing the fuse on the overload protection relay? This is located behind the battery, behind a thin plastic sub panel which houses the relay and other electronics. The relay is about 1 1/2" square X 2" tall, and has a flip cover to get to the fuse or fuses. Some models have a single 10A fuse, others have two. You might check these before going to much further. I have found that by jumping the car, you can blow the fuses, and very possibly the OVP as well. Good lock!