Question about 1990 Mercedes-Benz E-Class

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1991 mercedes 300ce wont start unless you pump the gas please help

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  • Mercedes-Benz Expert
  • 300 Answers

Defintly a valve,regulator or gas line leak,or injector leaking rail pressure

Posted on Nov 08, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

ginko
  • 19396 Answers

SOURCE: car audio installation 1993 300ce 2dr coupe

I think it should be as follows:
Left speaker ground Brown
Right speaker ground Gray.

The cable to the fader in the center console color may vary

Left + is Black/Green or Grey/Brown
Right + is Black/Red or Brown/Red

On this website instead (click here )
you can buy the complete wiring diagrams for $4

Posted on Jun 03, 2008

  • 4 Answers

SOURCE: My Mercedes SLK320 wont let

Not sure if it's a vacuum issue.... I will just push back the rubber seal and input the nozzle....Then it will dispense the gas....Not sure why..... It only happens at certain gas stations..
Good Luck!

Posted on Sep 14, 2008

Thunder55
  • 318 Answers

SOURCE: Fluctuating oil pressure on 92 Mercedes 300CE

Either the sending unit,(this unit is on the motor)is malfunctioning, or your engine oil pump may not be providing enough pressure.
This could be due to sticky oil pressure bypass valve,,worn out pump,,or worn engine main bearings.
If it is just a case of worn engine oil bearings,this is usually indicated by high oil pressure when cold,,but low oil pressure when hot,.i wouldn't worry to much, since most engines suffer from this same complaint and doesn't harm the engine any.

Posted on Jan 19, 2009

  • 4 Answers

SOURCE: 1991 mercedes sl 300 will not start, not getting fuel.

check inside of the trunk lid on driver side quarter panel or inside driver door

Posted on Apr 02, 2009

jasperoni
  • 203 Answers

SOURCE: mercedes 300ce Engine cuts out at any speed, even when ideling.

It sounds like a fuel delivery issue. Mercedes recommends replacing the fuel filter every 60k. If it has been longer than thast since the filter change start there. Fuel pump relays are another common problem on this era. They are located behind the battery. Remove the plastic cover and you will se 2 black relays( yours may have a mass relay if it is a 90 model year, it will have a plastic knob on top that you turn to the left to unsecure it) IT will say kickdown on it the climate control is the other relay and it will say klima. Look for signs of corrosion on the solder pins. If your fuel pump(located at the right rear) is very noisy when it operates I wouild recommend replacing it. During this era of Benz about the only way to diagnose this would be to run a bunch of fuel pressure tests and to drive vehicle with a meter on the relay and on the pump to see if the relay cuts out or the pump cuts out. I always recommend to do both pump and relay because they can cause one another to fail. good luck.

Posted on Sep 19, 2009

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How do I get my 1991 Mercedes 300CE to start back up after Air Bags deployed?


Check the trunk area for a reset button after impact.

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1989 mercedes 300ce.new fuel pump,filter and relay,have fuel pressure at distribution block but nothing at delivery pipes to nossles when cranking any help ????alan 0221039734


First start with basics check your fuses related to fuel and or injectors and make sure you have voltage. Next check your crank sensor sometimes when the sensor goes bad the computer doesn't know you are trying to start the engine because the signal the sensor is supposed to put out to the computer isn't there due to a faulty sensor once the computer senses the signal from the crank sensor then it will send a command to the injectors to start pulsating gas let me know how it turns out for you thanks.

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I ren out of gas & now my car wont start 1991


make sure the car is on a flat surface ,you can pour a little bit of gas down the throttle body or spray starter fluid in throttle body that should crank the car

May 09, 2011 | 1991 Mercedes-Benz 190

1 Answer

My isuzu starts but wont stay running unless u pump the throttle acts like its running out of gas but gas is going to injectors where exactly is the control to make it flash codes


You will have to hook an OBD I scanner to the ECM to check the codes. Good Luck! I hope you find this to be very helpful! The 1991 does not flash codes.

Dec 27, 2009 | 1991 Isuzu Rodeo

1 Answer

Mercedes 300ce Engine cuts out at any speed, even when ideling.


It sounds like a fuel delivery issue. Mercedes recommends replacing the fuel filter every 60k. If it has been longer than thast since the filter change start there. Fuel pump relays are another common problem on this era. They are located behind the battery. Remove the plastic cover and you will se 2 black relays( yours may have a mass relay if it is a 90 model year, it will have a plastic knob on top that you turn to the left to unsecure it) IT will say kickdown on it the climate control is the other relay and it will say klima. Look for signs of corrosion on the solder pins. If your fuel pump(located at the right rear) is very noisy when it operates I wouild recommend replacing it. During this era of Benz about the only way to diagnose this would be to run a bunch of fuel pressure tests and to drive vehicle with a meter on the relay and on the pump to see if the relay cuts out or the pump cuts out. I always recommend to do both pump and relay because they can cause one another to fail. good luck.

Sep 19, 2009 | 1987 Mercedes-Benz 300-Class

1 Answer

Car dies after about 20 minutes of driving,sputters slightly .


The fuel pump relay needs to be replaced. it is behind the battery and the fire wall.

Sep 11, 2009 | 1989 Mercedes-Benz 300-Class

1 Answer

1991 mercedes benz 300ce. When I start the car and buckle the seat belt or belts the warning buzzer comes on and off. I don't know if it is a seat belt problem or an ignition problem. I only have the car...


on the driver,s side under dash there is an audible relay called a seatbelt warnung relay. I would recommend replacing it because by just unplugging it you may experience interior lighting issues. It is a very common problem with that era of mercedes. If you remove the under dash you will be able to locate it by sound with the key on. Unplug it with the key off.

Apr 23, 2009 | 1991 Mercedes-Benz 300 Diesel

1 Answer

Fluctuating oil pressure on 92 Mercedes 300CE


Either the sending unit,(this unit is on the motor)is malfunctioning, or your engine oil pump may not be providing enough pressure.
This could be due to sticky oil pressure bypass valve,,worn out pump,,or worn engine main bearings.
If it is just a case of worn engine oil bearings,this is usually indicated by high oil pressure when cold,,but low oil pressure when hot,.i wouldn't worry to much, since most engines suffer from this same complaint and doesn't harm the engine any.

Jan 19, 2009 | 1992 Mercedes-Benz Mercedes Benz 300 Class

2 Answers

I have a 1991 300ce and the heat stopped working


The blower is mounted under the hood beneath the cowl panel. There is a blower regulator that could have gone bad or it is indeed a bad motor. Also have you checked your fuses?  This post is old. Has the problem been fixed? If so I am sorry no one took the time to help you here. If you still have a problem I' be glad to assist you any way I can. Just let me know.

Dec 03, 2008 | 1991 Mercedes-Benz E-Class

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