MB genuine part vs OEM
I have a 2008 E350 4MATIC. I recently had a blower motor (cabin heat and AC) replaced at an independent shop. Of note, the shop owner had always made it a point to state that he only used "Mercedes Benz parts" to justify the added cost and I have always stated that I only want the official MB parts used in the car. I was charged $250 for the part. On my bill from the independent shop, it states that the blower was OEM. Approximately 5 months later the blower stopped functioning. Because of dissatisfaction with other work done by this shop, I took the car to the dealer to have the blower replaced. The dealer also charged me $250 for a blower part. I asked the dealer to give me the blower that they were removing from the car. The blower that the indie shop had installed in the car is: Behr 8EW 009 159-601. (Of interest, on the part, I notice that someone has used a tool to scratch something from the surface of the plastic beside where the word "Behr" is stamped. My guess is that the part was a reconditioned part bought at a deep discount.) Searching the web, I find that this part can be bought for approximately $150.
Since the blower stopped working, I will ask the independent shop to refund the money that I paid him. Because the part is not a genuine MB part, which the shipowner had always stated that he used (and charged me MB parts prices), do I also have a complaint about the part used or is the Behr part listed above an "OEM"part as is it is described on the invoice?
Again, thanks very much.

cetialpha5, Yes, I have been using the dealer exclusively for several months. I had been smelling burned oil in the cabin when the heat was on and the indie shop had told me there was no leak at the cylinder head cover when I asked them to examine it as a source of the odor. The dealer service physically showed me stains caused by the oil leak, replaced the cylinder head cover, and fixed the problem. The convenience of the dealer shuttle and savings from the loaner combined with free car detailing negate any advantage in lower cost at the indie shop IMO.




For my whole life I was under impression that Mercedes is German car.

You have to learn the gimmicks in sales.
OEM part means it come for factory that sells some parts to MB assembly lane.
But is the part you are buying the part they supply to assembly lane?
For example XXX company supply windshield wipers for MB. They they figure out they might try their luck with turbos. Will the turbo be assembly lane quality? I doubt, but you are welcome to be Guinea pig.
"OE quality" is the biggest stretch. Who determinate it to be good quality? Do you see certificate?
--Kyle
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OEM Behr does not have the doom over the motor coil same as Genuine MB and the bearing quality is not as smooth/good .
I recently bought OEM and had to return to get Genuine MB part because low speed (1-3) noise.
The Best of Mercedes & AMG
--Kyle




What is the difference between OE and OEM ?
OE is a part manufactured by whoever, but per MB specifications and inspected by MB quality control.
OEM is the part made by the same manufacturer, but without MB quality control, therefore you can see MB logo removed.
When the part might come from the same mold, there has to be a reason why it lost MB approval.




OEM - part installed on the car at time of manufacture. These may or may not be the exact same part over the run of the model or part application, nor by the same manufacturer. Car manufacturers often dual source parts to ensure supply chain competitiveness and sourcing insurance (so to speak).
OES - part supplied to Manufacture for service through their dealer network. These may or may not be the exact same as the OEM. Consolidations, supersessions, improvements take place once in use, etc. Suppliers go out of business and the car manufacturer is forced to source elsewhere.
AFTERMARKET - part supplied by OEM manufacturer or other company (ie: OE/equivalent), and you're not buying these parts from the dealer. In the case of being supplied by the OEM manufacturer - that part sometimes starts life as both OEM/OES and IAM with the IAM version not having the customer logo information. It's not uncommon for pure aftermarket suppliers to source OEM parts and re-box them - ie: Beck/Arnley. It's also not uncommon for OEM parts manufacturers to supply other OEM part manufacturers their parts for their aftermarket programs, ie: Siemens.




OEM - part installed on the car at time of manufacture. These may or may not be the exact same part over the run of the model or part application, nor by the same manufacturer. Car manufacturers often dual source parts to ensure supply chain competitiveness and sourcing insurance (so to speak).
OES - part supplied to Manufacture for service through their dealer network. These may or may not be the exact same as the OEM. Consolidations, supersessions, improvements take place once in use, etc. Suppliers go out of business and the car manufacturer is forced to source elsewhere.
AFTERMARKET - part supplied by OEM manufacturer or other company (ie: OE/equivalent), and you're not buying these parts from the dealer. In the case of being supplied by the OEM manufacturer - that part sometimes starts life as both OEM/OES and IAM with the IAM version not having the customer logo information. It's not uncommon for pure aftermarket suppliers to source OEM parts and re-box them - ie: Beck/Arnley. It's also not uncommon for OEM parts manufacturers to supply other OEM part manufacturers their parts for their aftermarket programs, ie: Siemens.




There is one other twist. 3 OEM’s bid on an opportunity. Let’s say a spark plug. Bosch, NGK and Denso. All three are approved to supply. Only 2 are sourced. The third offers it in their aftermarket program and it’s an equivalent only. Even though it’s from an OEM supplier - it was never supplied OEM. 10 years go by. The 2 sourced suppliers drop it. The third keeps it in their offering and the car manufacturer picks it up for OES.




Last edited by tjts1; Jan 22, 2020 at 10:57 PM.








There is one other twist. 3 OEM’s bid on an opportunity. Let’s say a spark plug. Bosch, NGK and Denso. All three are approved to supply. Only 2 are sourced. The third offers it in their aftermarket program and it’s an equivalent only. Even though it’s from an OEM supplier - it was never supplied OEM. 10 years go by. The 2 sourced suppliers drop it. The third keeps it in their offering and the car manufacturer picks it up for OES.
2MERKS
Last edited by tjts1; Jan 23, 2020 at 08:21 PM.

I thought you were going to tie in the dirty diaper part as a result of getting the bill from the Mercedes dealer.
I too bought the OEM Behr blower and noticed the MB star scraped off.
I just assumed it was an MB blower sold directly by Behr and they couldn't sell it with the Star.
Peter
I also have replaced the blower motor and regulator/resistor on my E320 CDI, as well as two of our W220's. Turns out the regulator is the same Behr part across both chassis models. Yep, MB has a part # for each model, but it's the same actual part; I've opened them up and compared 'em. The newer Behr-brand blower motor assembly did look slightly different, using a white fan blade vs. the black fan blade used on the OES (Genuine-MB) assembly, though the Behr-brand unit, too, was made in Germany. This was the case for both the W211 blower motor and the W220 blower motor. We'll see, with time, how long these Behrs last, but so far, so good over the last year.



