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  #1  
Old 07-14-2009, 11:19 PM
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Replacment for the interior A/C drain tube?

I found the reason for my driver side carpets being absolutely soaked. First I thought it might have been rain getting in.

Nope. I removed the knee panels and found that the A/C drain tube on the driver side has fallen all apart.

Is this an orderable item?

If not, has anyone replaced it with something that works?

This is on the SDL. It's the tube with the steel spring inside to keep it from collapsing.

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'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
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  #2  
Old 07-14-2009, 11:43 PM
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Yeah,It's orderable...The Same Foam tube

Although,I'd go with something like this:
http://www.mcmaster.com/#tubing/=2r090w
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Replacment for the interior A/C drain tube?-screenhunter_01-jul.-14-23.43.gif  
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  #3  
Old 07-14-2009, 11:45 PM
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Used this on the W123 and it worked great. Cut to length.

http://www.lowes.com/lowes/lkn?action=productDetail&productId=50367-712-DWC-OO&lpage=none

Dave
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1970 220D, owned 1980-1990
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1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
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  #4  
Old 07-14-2009, 11:52 PM
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The factory drain tubes on the SDL just cracked and fell apart. I used plain ole heater hose, think it was 5/8" - no problem at all.
I wasn't about to mess around with the foam /spring gizmo MBZ used - it's a drain tube - not a plasma conduit.
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  #5  
Old 07-15-2009, 09:36 AM
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Here is the fix - see post #14

Here is your answer - see post # 14

http://www.peachparts.com/shopforum/showthread.php?t=193611&highlight=drain
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  #6  
Old 07-15-2009, 12:03 PM
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The PO replaced the one on mine with a piece of heater hose. It actually looks like it belongs there. PITA to get to though.
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  #7  
Old 07-15-2009, 12:20 PM
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Very good ideas.

Thanks guys!
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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

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  #8  
Old 07-15-2009, 01:30 PM
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I used a section of foam pipe insulation with the slit left intact (not split), but facing up so the water doesn't really hit it. No problem in well over a year, and fairly easy to bend into place.
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  #9  
Old 07-15-2009, 01:39 PM
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my solution was to use 1" heat shrink tubing that I shrunk once I had in place.
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  #10  
Old 07-15-2009, 02:01 PM
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Quote:
Originally Posted by wgilmore View Post
I wasn't about to mess around with the foam /spring gizmo MBZ used - it's a drain tube - not a plasma conduit.
You'll be in for a surprise then, the next time you need to reroute your AC output through the EPS relays to your main deflector dish to close the subspace pothole your SDL got pulled into that week (like it does every week).

Really though, what was Mercedes thinking with the foam tubes in the climate control system?
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  #11  
Old 07-15-2009, 02:16 PM
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Top 1/3 of a plastic iced tea bottle turned upside down for a 123.
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  #12  
Old 07-15-2009, 03:02 PM
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kerry,

I have seen that solution, but didn't go that route b/c I was afraid it would rattle around while driving and make me go CRAZY!!!!

Does yours move/rattle much?
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1979 maple yellow 240D 4-speed


Gone and fondly remembered:
1980 orient red 240D 4-speed

Gone and NOT fondly remembered:
1982 Chna Blue 300TD

Other car in the stable:
2013 VW Jetta Sportwagen TDI / 6-speed MT
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  #13  
Old 07-15-2009, 06:33 PM
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I've solved this with the plastic bottle kludge cited elsewhere in this thread. But in a special moment, I also ordered a replacement from MB. It looked remarkably replaceable by a hunk of that closed cell water pipe insulation they sell in 8 ft lengths at the big box store for a buck or so.
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  #14  
Old 07-16-2009, 01:05 AM
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Quote:
Originally Posted by 81Wagon View Post
You'll be in for a surprise then, the next time you need to reroute your AC output through the EPS relays to your main deflector dish to close the subspace pothole your SDL got pulled into that week (like it does every week).

Really though, what was Mercedes thinking with the foam tubes in the climate control system?
Yes, I'm sure I'll be screwed when the primary deflector stops working on the SDL due to a plasma coolant leak.
Seriously though , I've seen a lot of dumb a$$ things done by MBZ on the 126 cars , but this one is just abject engineering folly - a joke on the American consumer. I imagine Gerhardt speaking to Hans describing how funny it will be to read reports of wind shields leaking into drivers side wetting carpet. Yep...
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  #15  
Old 07-16-2009, 07:47 AM
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I think some of you are stomping on the toes of some of the best auto engineers in the world. The purpose of the foam drain tubes is to keep road noise from coming back up the tube into the passenger compartment. Or maybe not but that is my story and I am sticking to it. ha ha
Paul

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