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  #1  
Old 08-31-2017, 12:11 PM
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1995 124 Wagon Getting Gas, Getting Spark - Won't Start

I have a 1995 124 Wagon and when starting it won't fire, which is intermittent, as sometimes it starts just fine and sometime it turns over but won't start.

Any ideas?

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  #2  
Old 08-31-2017, 03:06 PM
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Have you checked the starter itself? How do the injectors look? Fuel pressure good?
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  #3  
Old 09-01-2017, 08:50 AM
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overvoltage protection relay can cause that , repl with known good one, near battery , or fuel pump or relay , its the green relay near battery
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Old 09-01-2017, 09:02 AM
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X2 on nulu's advice. Change them both.
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Old 09-01-2017, 09:52 AM
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Thanks guys...I'm pretty sure it's the fuel pump as you can't hear the pump motor whine when you turn the key on. Replaced it a month ago and there must be a loose wire or the cheap aftermarket generic pump I put on it went out. Will check it out!
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Old 09-01-2017, 11:03 AM
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Unlikely to be the fuel pump, find the fuel pump relay (goes by many different names depending on the generation of car). They're well known for taking a dump and failing in intermittent ways.
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Old 09-01-2017, 12:37 PM
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Can any of you be more specific to the location of the fuel pump relay?
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Old 09-01-2017, 01:10 PM
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Checked under the hood by the battery and didn't see a green relay! Is there some other place it could be located at. I found this picture online and it's the only one I can find that's green. Is this it?


Last edited by MB300se65; 09-01-2017 at 01:20 PM.
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  #9  
Old 09-01-2017, 01:33 PM
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OK...so looking in this relay box there's no relay there as showing in the picture I just downloaded and posted above!
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  #10  
Old 09-01-2017, 02:01 PM
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I can't be more specific as I'm not more familiar with the newer cars, but you're likely looking for a module, usually labelled something like MAS. You will have to Google your specific year and model to find what it is and where it's at. It won't be a simple cube relay. The guts contain a circuit board and are known for poor solder joints and burnt traces.
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  #11  
Old 09-01-2017, 11:28 PM
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Fuel pump relay is green...Part #: 001-542-96-19-MBZ

OVP is behind the battery.

I have a 95 wagon with 300,000 miles and I have changed every part at least once!

If your fuel pump checks out them check the crankshaft position sensor.

BTW...how many miles and was the wiring harness renewed?
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  #12  
Old 09-02-2017, 05:19 AM
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My w124 the fuel relay, sits next to the ovp at the rear of the battery. ..
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  #13  
Old 09-02-2017, 09:57 AM
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On my 93 the OVP and fuel pump relay were behind battery. There is a black plastic cover between the battery and firewall that needs to be removed to access them.
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  #14  
Old 09-03-2017, 04:59 AM
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The relay could be in any of these locations .The 1995 was one of the last to be made and might have the relay in the rear of the fusebox if its not there then it will be at the rear of the battery ,pull out the plastic shield to get at them .

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