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Discussion Starter #1
Should there be 2 vacuum lines for the vacuum advance? 20200222_113710.jpg

Is there some type of vacuum diagram?

I see a fuse box and what I think is the voltage regulator and I have no idea what the other one is... relay? The schematic only shows 12 fuses. Found these fuses in the engine compartment. Looks like only 1 of them are being used
20200222_125834.jpg

Thanks,
Anthony 67 250s auto
 

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1967 250 SL, 1965 300SE lang
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The secondary fuse boxes are for things like radio and air conditioning. Not sure what else it could be. No idea on the vacuum lines. I don't know that stuff.
 

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68 250S, 91 300se, 98 SL500, 450SEL 6.9, 14 CLS550 Past MB's; 300SD, 300E, 300TE, 190E, ML420
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Only one vac line to distributor. It is for the vacuum advance. You need this line. The vac line is easy to get, the little threaded fitting and ferule can be purchased from MB. The other end goes to the carbs.

2621847


I'm not entirely sure what the fuses are for and I've had my 250s for over 40 years. You are correct, there is little documentation of these fuses. All 4 are used, the lower side is common across all terminals. You could pull one at a time and try various items like windows. AC, roof and other optional items that are not listed on regular fuse chart.
 

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Discussion Starter #4
Thank you all for your input. So all 4 fuses are used with 1 12v input? That sounds very weird but I will try to confirm that. This car does not have AC so I will see what exactly those fuse are for.

As far as the vacuum to the distributor, the top line is for vac advance, this line just goes to both carbs to the top of the vacuum advance? The bottom nipple is unused?

Thanks,
Anthony 67 250s auto
 

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1967 250 SL, 1965 300SE lang
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... there is little documentation of these fuses. All 4 are used, the lower side is common across all terminals.
I'm not seeing the common across all terminals. Where are you seeing that? To me it looks like 4 individual fuses where one is being used...
 

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Looks to me like someone swapped distributors. You would use the top port on vac pod only. The bottom one on the backside is for retard so dont use it.
 

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Look at the picture there is one with a screw and the other 3 have rivets. The connecting bar is underneath.
 

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Looks to me like someone swapped distributors. You would use the top port on vac pod only. The bottom one on the backside is for retard so dont use it.
Ok I will just hook up the top. Car needs a lot of work so I'm sure I will have a lot of post coming soon.
 

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Look at the picture there is one with a screw and the other 3 have rivets. The connecting bar is underneath.
Interesting. I had not noticed that. I have no idea what 4 things that is powering.
 

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Discussion Starter #10
Well as soon as I found out all will know. Once I get the car running I will troubleshoot the electrical and document it
 
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