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Anyone know where I can find a parts diagram for a Bosch 0438100068 fuel distributor?

I mistakenly let my ‘78 450SL (107.044...) sit for a couple years and the ethanol fouled the FD. I have this car in my profile on eBay so when I searched for parts, it gave me the wrong repair kit. It even has a list to see if it’s compatible which wrongly listed my car. Because I didn’t use it right away, it was over 30 days and they refused to help me even though their information was wrong.
So I forged ahead using what I had to rebuild the FD but some parts I needed were missing so I had the keep using some old ones.

The big mistake I made besides buying a kit for a different unit was to remove all rubber seals in the FD first before checking that I had the new replacements. There is a small cylindrical spring loaded check valve in the top outlet. From this, a line drops down to some regulator right below it. Apparently no one ever services this because I’ve learned that the rubber seals are factory pressed in and cannot be replaced. Before I knew that, had already removed them with a pick tool and ruined them.

So now I need to find what this assembly is properly called and hopefully get some part numbers. Then I can buy this check and spring which is all I need now to get this engine running again.

I’d appreciate any help or information you can offer. Thanks!


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1984 380SL
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Did you check salvox.com ? I recall them having a repair kit. You might also be able to source rubber bits at your local hardware store to replace the old ones. I would check to make sure the material going in is resistant to petrol first.

If you can't rebuild it, there are two rebuilders you can reach out to. CIS Flowtech in the US or K-Jet Specialists – K & KE-Jet Parts, Reconditioned Fuel Distributors & Warm-Up Regulators in australia. Both can rebuild these for you for a price.
 

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1985 380 SL
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Where did you get your kit? I got mine from cis-jetronic.com, they had a kit for my '85 380SL. The part you refer to is the pressure compensating valve. They don't list a kit for your exact distributor number, but perhaps they can provide some direction on where to find the seals for this part.
 

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1985 380 SL
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Here is some info I have regarding some of the parts of the fuel distributor. It lists the pressure compensating valve kit as Bosch p/n 3 437 010 024. The distributor number is different, so the spring in the valve may be different, but I believe the seals will all be the same. Perhaps this kit is available somewhere.
 

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Discussion Starter #6
I tried Salvox and CIS-jetronic. I bought the rebuild kit from CIS-jetronic on eBay. I wrote an email to customer service and they took two weeks to tell me that I made the mistake and they wouldn’t help me. Ouch!

There are rebuild kits for the fuel distributor and the primary pressure regulator valve but none for this compensating valve.

Thanks for your comments,


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The PDF diagram and parts list were helpful. May I ask where you found it? I’d like to find the same for Bosch 0438100068. It looks like the part is for the assembly of the cap, piston compensating valve w/ seals and spring.
Thanks!


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'79 450SL, '04 CLK200 convertible; former A124, W210, A209.
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Following this thread with interest as I've a feeling this job will be due on my 79 450SL at some point in time...
 

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The PDF diagram and parts list were helpful. May I ask where you found it? I’d like to find the same for Bosch 0438100068. It looks like the part is for the assembly of the cap, piston compensating valve w/ seals and spring.
Thanks!


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I think I found it here: Technical archive

It was under "technical archives" but the search functions appear to be disabled at the moment.
 

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Discussion Starter #11
My local Bosch-certified repair center has not been able to help. I wrote to Bosch-Classic in Germany. Although their site is down, they sent me some parts diagrams for my fuel distributor. Unfortunately none of the parts that I was searching for are available anymore.

So, plan B is to try to buy some rubber washer or o-rings that will replace the seals I mistakenly removed. If that fails, I go to plan C and I will search the junkyards for the same Bosch fuel distributor and hopefully get a bargain.

I have to make it work somehow without spending $500-1000 for a rebuilt one! Wish me luck!


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