Thanks to everyone who put together this info to show how to replace the fuel filter. I just replaced mine (2020 sprinter) and found the original OEM filter was the same as the one shown in the 9/20/21 post by Pharkas with MB part number 642 090 48 42, WK 820/6. I installed a new one I had ordered from Amazon for $44, see attached link. It looked identical and fit perfectly (I was able to install it without removing the turbo intake hose, and I removed the (3) bolts holding the filter and clamp ring to better access the clamp ring bolt). The local Mercedes parts shop had told me they would need to order the fuel filter and it would cost over $200. After I did the replacement I took to used filter in to show them and it turns out they do stock one and the filter they thought I needed based on VIN number was a different one. They said the actual replacement for mine should be p/n 642 90 64 52, WK 820/21, photo attached. MB cost at dealer is $150. I’ve seen others have used the WK 820/15. I’m not sure the differences. Note - the $44 one from Amazon came with another plastic clip for the side water hose, and the $150 820/21 does not.
I’m interested in anyones comments on paying the premium for the actual MB parts (fuel filter, oil filter, etc) vs the parts from Amazon, Advance Auto, etc that seem identical but don’t have the MB name on it?
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Keith you invited a comment so here goes>
First before making a few statements I am
"the trade so to state", consequently
"some folks" on this forum site consider me to be
"The frienemy" in their midst !
Yesterday it was a "keyboard warrior" , which is better I suppose than being labeled by a few members as a thief, or even a fleeser of the American public (.love that one !)
To reiterate as I do frequently we auto techs / mechanics and repair shop owners, even franchise dealers,
simply sell Parts, Labor and that intrinsic or intangible to many called "doing the knowledge", especially if you are product trained in this case by Bosch .
Now I have absolutely no issue with you, or anyone else for that matter doing a DIY job, and buying in the aftermarket. Let's face it everyone wants to save money even me.
So playing the devil's' advocate here are some statements or questions.
1) You have installed a new filter you bought online and fitted it. Seemingly a successful job. money saved
Question :- How do you know it's good to spec and flowing correctly ?".
2) As a right of DIY passage with fuel filters you bust off that little Tee piece which is part of the leak off rail. (read expensive parts to replace)
Now some forum warriors proudly replace it with a brass tee as basically a field repair. I as "trade professional I won't do that if one gets busted off.
There is a specific reason why .
Question :- what does that expensive simple looking tee piece do or what is its function and why will I only replace the whole Kahuna ?
3) MB recommends changing the fuel filter @ 20,000 mile intervals.
At an A service I or my staff quickly determine the filter should be changed at
10,000.
Disputing that you doggedly follow the MB directive because its written, and what does this
dumb grease monkey know, other than trying to sell an expensive filter @ $120
Question:- At an A service how did I quickly determine you need a new filter ?
4) Equally you do your own servicing, but the van just isn't performing right, and there are no codes in the ECM .
You reluctantly take it to a shop like mine, hoping its not a wallet flush .
I state that the aftermarket filter you installed is not flowing right.
Question:- Again How did i determine that?
5) I might on the way of all this diagnosis suggest a new fuel pump @ $450 plus labor .
You changed the fuel filter hoping to fix a drivability problem and made it worse .
Mr Jones the customer in this situation concludes I am a thief and leaves.
Question:- How did I determine fairly quickly that the customer needed an in tank pump and a genuine fuel filter?
All food for thought.
Dennis
