I bought a new Kaehler Overload Protection Relay for my 1991 300d but .... it doesn't fit. It only has 6 pins and my old one has 7 and the pins are different. There's no way this will fit, even though it's supposed to be for W124's.

I'm just wondering if they sent me the wrong part or if the 300e W124's are different than the 300d?

Thanks,

jeff

I believe the gas and diesel versions use different relays, based on a lot I've seen in the junkyard. Your car is a 5-cylinder OM-602? and the gas cars use a 6-cylinder M-103 or M-104 (don't remember when MB made that change). EPC will show the different part numbers.

Jeremy

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

I looked up some stuff online now and yes, the diesel ones are different.

Return it .Wrong one for your car . Give your vin number to obtain the right ovp relay .You should know the vin number .Pluging in other parts can bring a bigger problem along. The number i have is 2015400845 i would check it first . This number was taken off one thats for sale on ebay in uk .

I need one for a 1994 e320. What's part number ?

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What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

the part numbers on the original relay

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2011 e320 cdi (132,000) current
2005 Jeep CRD diesel--2.8L (138,000 miles) wrecked, insurance took
1993 Mercedes benz 300D 2.5 Turbo Frybrid powered. (336,000 miles) wrecked and sold as parts car
1990 Mercedes benz 300D 2.5 Turbo (170,000 miles) wrecked and sold as parts car

Check out my Frybrid Vegtable Oil Conversion at http://1990300dfrybridconversion.shutterfly.com/

Biopete i find this number for your OVP is- 2015403745.

Hi guys, quick FYI:

After receiving complaints (hat tip to Mr. O'Brien on BW for his detailed feedback), in 2018 we made several design changes to URO Overload Protection Relay relay 201 540 3745. We made the circuit board traces wider to handle heat better, and added plastic insulators to prevent PCB to metal case shorts.

In fact, if you check the verified buyer reviews on that big "jungle" online retailer, we received nothing but 5-star reviews in 2019 and 2020 for our updated version of OVP relay 2015403745 !

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Event Video: Cars & Coffee 2023, Simi Valley CA: https://youtu.be/CFfY9CPVuEs
URO Parts online catalog: https://apaindustries.com/catalog

2021 update: Though we've had good success with our 2nd-generation (2019+) Overload Protection Relay 201 540 3745, we've recently experienced some supply chain issues and are going to have these assemblies manufactured on a new production line.

Unfortunately we'll be out of stock until we have the new 3rd-gen version available, thanks in advance for your patience.

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Event Video: Cars & Coffee 2023, Simi Valley CA: https://youtu.be/CFfY9CPVuEs
URO Parts online catalog: https://apaindustries.com/catalog

Thanks for the update. Some here fuss about URO parts, but what other supplier provides similar helpful and candid information?

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans