replacing OVP - Mercedes-Benz Forum
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post #1 of 19 (permalink) Old 04-22-2015, 03:15 PM Thread Starter
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Vehicle: W124 300CE-24 1991, japan spec
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replacing OVP

hello everyone, my car has a rought idle, cold start problems & a occational stalling so after a small inspection of my mechanic, he found that the OVP has some loose solder inside but the two fuses are in good shape.

just i buy any "red" OVP with two fuses & replace or should i buy a especific OVP for my car? also where to buy it?

My car is a 1991, 300CE-24, japan spec & has the m104.980 engine.


Many thanks
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post #2 of 19 (permalink) Old 04-22-2015, 06:13 PM
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ideally, you look up the correct part number for your VIN in the EPC. Stribel and KAE makes them for Mercedes and those are pretty widely availalbe via the aftermarket parts supply chains.

My M103 based 1990 uses 2015403745, while my M104.992 based E320 uses 0005406745 or 0005405245. I've never had a 104.980 so I dunno what it uses.

EPC suggests a Japanese market 124.051 300CE-24 uses the 2015403745 also.

I'd get it from here,
https://www.fcpeuro.com/products/mer...lay-2015403745

but if you're in Chile, I doubt they ship there.
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post #3 of 19 (permalink) Old 05-06-2016, 11:27 AM
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Hello there...

I would like to kknow if someone can help me on this. Uro parts might have doomed my W124. Take a look at the OVP... What might have happened with other parts?? The car cranks, but does not start...
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post #4 of 19 (permalink) Old 05-06-2016, 12:20 PM
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Is the failed OVP relay Uro brand? If so... I hope you learned a lesson here. Also read this thread for more enlightenment:

https://www.benzworld.org/forums/w126...uro-parts.html


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post #5 of 19 (permalink) Old 05-06-2016, 12:52 PM
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But, but according a certain forum member URO is "da bomb a.k.a. da sh!t" and anybody who even dares to think about buying the genuine MB version is a fool/moron.
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Last edited by sbaert; 05-06-2016 at 12:55 PM.
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post #6 of 19 (permalink) Old 05-06-2016, 03:02 PM
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Quote:
Originally Posted by Itamar View Post
Hello there...

I would like to kknow if someone can help me on this. Uro parts might have doomed my W124. Take a look at the OVP... What might have happened with other parts?? The car cranks, but does not start...
Must be like their flex disks. Guess they don't *quite* meet the standards.

Another reason to avoid their stuff.

Dan
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post #7 of 19 (permalink) Old 05-06-2016, 04:14 PM
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Quote:
Originally Posted by Itamar View Post
Hello there...

I would like to kknow if someone can help me on this. Uro parts might have doomed my W124. Take a look at the OVP... What might have happened with other parts?? The car cranks, but does not start...
Quote:
Originally Posted by 1mbzdoc View Post
just hooking up cables can damage ovp relay. i have worked on these cars for more than 30 years and the old cars have no problem with jump starts but the computors dont like spikes or low voltage. the sl is probably mercedes most jump started model because they sit in garage most of the time. i have seen the fuse in ovp relay blown after correct jump start so to say that all reports of damage are from incorrect cable hookup is just not true. a battery tender is best option will keep batt from getting low. very little damage reported from vehicle with dead batt most of the time damage is on the vehicle that is used for jumping. just disconnect good bat from car than use it to jump. mercedes reccamends to only try to start car when batt is fully charged. not reccamended to start with low bat
Did you jump start your car? This is a common cause of ovp relay issues.
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post #8 of 19 (permalink) Old 04-05-2017, 11:17 AM
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Now, with a new OVP, kaehler, the OVP SPARKS!!!
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post #9 of 19 (permalink) Old 04-10-2017, 05:19 AM
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Hello everyone, i want some help about a problem that i got recently. im kind of amateur so any help would be great. I have s124 200TE...the car worked fine until yesterday when i tryed to start it and it didnt. My battery was down sudently...i didnt hear the fuel pump running. i thought maybe is problem of the fuel pump because i checked the fp relay and it looks in good conditions. as i have a lpg too, i tryed to start it with lpg,,,(i did this some times before and it started) but didnt happen anything...the car cracks but not started...so i found the ovp relay but o dont know in what condition it is because theres a lot of rust...so do you think thr cause of all this is the ovp? thank you
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post #10 of 19 (permalink) Old 04-10-2017, 06:17 AM
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Rusty OVP? Post a picture, but your symptoms sound more like worn out voltage regulator. The discharged battery is the key
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