W111 220SE fintail mystery hose - Mercedes-Benz Forum

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post #1 of 24 (permalink) Old 09-11-2016, 01:02 PM Thread Starter
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W111 220SE fintail mystery hose

My later run car (dual circuit brakes) has a small diameter hose coming out of the firewall area on the driver's side, at a lower elevation than the brake reservoir. What is this? It isn't connected to anything, is this intentional? Should I route it to a specific area, or attach it to something? I only have the exploded parts diagram book for 1962, which does not seem to show this hose. Excuse the pic, my phone camera doesn't like being down there, and the garage is very dark:

Thanks!
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post #2 of 24 (permalink) Old 09-11-2016, 02:50 PM Thread Starter
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Thinking aloud, could be an air intake for the foot operated windshield washer/wiper? It's funny, I have owned this car for over 20 years and have seen the hose, but just today noticed that it isn't attached to anything. Not sure if it came loose, if I bumped it loose, or if it is meant to be loose. The car seems to be running and driving as normal.
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post #3 of 24 (permalink) Old 09-12-2016, 05:39 PM
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Oil pressure line?

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post #4 of 24 (permalink) Old 09-12-2016, 08:22 PM Thread Starter
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I'll check that out. I don't remember the gauge catching my eye when I drove the car, but I didn't drive it too long. I am away from the car now and probably won't be able to drive it again for about a week or two. I'll update when I learn more.

Last edited by HockeyGod; 09-12-2016 at 08:37 PM.
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post #5 of 24 (permalink) Old 09-13-2016, 06:40 AM
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Quote:
Originally Posted by HockeyGod View Post
I'll check that out. I don't remember the gauge catching my eye when I drove the car, but I didn't drive it too long. I am away from the car now and probably won't be able to drive it again for about a week or two. I'll update when I learn more.


If there's was a break in the oil pressure line, the engine bay would be a mess. I didn't think too much before responding, but on one of my carbed m130 (m180 family) engine cars rodents had eaten through the oil pressure line and I had to put a vice grip on the line to clamp it off. The vice grip was a permanent modification that went on with the car when I sold it.
It was in the approximate area you show.

I've never had an early mechanical injection car. So I don't know what might cross the firewall other than:

- speedometer cable which usually seems to come in near the pedals.

- temperature sensor wires

- oil pressure gauge

- tachometer wires?

- fuel gauge wires (might come up through the body)

???
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post #6 of 24 (permalink) Old 09-13-2016, 10:07 AM
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Perhaps a water drain tube for the cowl area?
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post #7 of 24 (permalink) Old 09-13-2016, 02:08 PM
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Where are the ends of the hose located? maybe pictures of those areas?

vacuum related? or water?
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post #8 of 24 (permalink) Old 09-13-2016, 04:20 PM
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Quote:
Originally Posted by HockeyGod View Post
My later run car (dual circuit brakes) has a small diameter hose coming out of the firewall area on the driver's side, at a lower elevation than the brake reservoir. What is this? It isn't connected to anything, is this intentional? Should I route it to a specific area, or attach it to something? I only have the exploded parts diagram book for 1962, which does not seem to show this hose. Excuse the pic, my phone camera doesn't like being down there, and the garage is very dark:

Thanks!
A drain tube for the cowl vent.
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Thanks a Million
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post #9 of 24 (permalink) Old 09-13-2016, 08:04 PM Thread Starter
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Thanks! I like this answer, sounds logical. Should it be attached to anything? It's loose, it is routed down near the dipstick area. Doesn't seem right, like I have never noticed it there before. I was rooting around doing a little cleaning not long ago, I could have knocked it loose.

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A drain tube for the cowl vent.
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post #10 of 24 (permalink) Old 09-13-2016, 08:06 PM Thread Starter
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The engine is clean (well, not oily), yeah, I don't think it is that.

I am liking the drain for the cowl vent answer, I suspect that's it.

I don't recall looking at the gauges specifically when I drove it, but nothing seemed amiss. Probably just something that needs to be plugged in.

Thanks everyone for the help!


Quote:
Originally Posted by Fonzi View Post
If there's was a break in the oil pressure line, the engine bay would be a mess. I didn't think too much before responding, but on one of my carbed m130 (m180 family) engine cars rodents had eaten through the oil pressure line and I had to put a vice grip on the line to clamp it off. The vice grip was a permanent modification that went on with the car when I sold it.
It was in the approximate area you show.

I've never had an early mechanical injection car. So I don't know what might cross the firewall other than:

- speedometer cable which usually seems to come in near the pedals.

- temperature sensor wires

- oil pressure gauge

- tachometer wires?

- fuel gauge wires (might come up through the body)

???
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