leaking air shock repair: Fix-a-Flat - Mercedes-Benz Forum

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post #1 of 17 (permalink) Old 05-09-2014, 07:57 AM Thread Starter
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leaking air shock repair: Fix-a-Flat

I have a leaking air boot on my 2008 R320. Just small invisible cracks allowing air to leak out slow enough that it rides fine, but is bottomed out by morning on cold nights. Has anyone ever had luck trying to stop leaks with Fix-a-Flat?
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post #2 of 17 (permalink) Old 05-09-2014, 08:47 AM
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No, definitely not. That Airmatic system is FAR too sensitive and besides that, fix-a-flat is for tires, and it is NOT a real repair. Trust me when I say this, replace that strut, and do it sooner rather than later. Your air compressor is working overtime to keep air in that strut while you're driving, and the compressor will burn up if you wait too long.
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post #3 of 17 (permalink) Old 05-09-2014, 09:13 AM Thread Starter
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what your saying makes perfect sense. The suggestion was posed to me and so I was curious the experts has to say. I did monitor the compressor cycles and they are very low. So, while I know I need to deal with it asap, the leak is very slow; needed to use soapy water spray to find it. Thanks for input.
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post #4 of 17 (permalink) Old 05-09-2014, 11:44 AM
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I have a leaking air boot on my 2008 R320. Just small invisible cracks allowing air to leak out slow enough that it rides fine, but is bottomed out by morning on cold nights. Has anyone ever had luck trying to stop leaks with Fix-a-Flat?
Please try these as replacements. The are a lifetime warranty and much less money than MB wants to for the parts.
https://www.arnottindustries.com/par...ENZ_yid18.html
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post #5 of 17 (permalink) Old 05-09-2014, 12:11 PM Thread Starter
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Upon giving this some more thought, and looking at the system; I don't see why the complexity or sensitivity of the system would come into play re: adding fix a flat or Slime. The air strut is essentially a tire; as in a rubber bladder full of air. As far as I can tell, the brains of the system (the sensors) are not located in the strut. Is there anything sensitive in the strut? Unless there are pressure sensors in the strut, I don't see adding fix-a-flat having any adverse impact. I don't acknowledge the possibility of this working as a permanent fix, but am curious to see if it will work as a short-term fix, as in while waiting for a new strut to arrive, which could be a week.
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post #6 of 17 (permalink) Old 05-09-2014, 01:07 PM
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Because the Airmatic compressor draws in fresh air and applies air pressure through the lines to the Air Bladders. This is a system that is meant to be dry, no fluids, no foreign substances, just air. And I'm curious how you plan to get Fix-A-Flat in the strut to begin with?
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post #7 of 17 (permalink) Old 05-09-2014, 04:38 PM
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And I'm curious how you plan to get Fix-A-Flat in the strut to begin with?
PFM approach. Pure F#$@ Magic.
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post #8 of 17 (permalink) Old 05-12-2014, 04:54 AM Thread Starter
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PFM: surprisingly I never heard that one before; like it. I'm sure I can a assemble a few adapters to reduce down from the F-O-F hose to the compressor line. haven't decided if I'll try it yet or not, but if I do, I'll report on my success, or failure for everyone's benefit/enjoyment. Flyboy in Ormond; you a Riddle Grad? I'm glass of '96 AE.
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post #9 of 17 (permalink) Old 05-12-2014, 06:18 AM
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PFM: surprisingly I never heard that one before; like it. I'm sure I can a assemble a few adapters to reduce down from the F-O-F hose to the compressor line. haven't decided if I'll try it yet or not, but if I do, I'll report on my success, or failure for everyone's benefit/enjoyment. Flyboy in Ormond; you a Riddle Grad? I'm glass of '96 AE.
Negative, I wouldn't know what the kind of money it takes to go to Riddle looks like.
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post #10 of 17 (permalink) Old 05-12-2014, 08:18 AM
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Ultimately it's your decision what to do with your R-Class, I will offer one last piece of advice (and this is coming from a former Mercedes-Benz technician... ME). If you introduce something like fix-a-flat into the Airmatic system, your car will end up in the dealership within a very short time, all four corners will be on the ground, and they'll give you a $5,000 estimate for all the air struts, lines, compressor, relay, and various other parts, because the whole system will have to be repaired. Google "Air Conditioning Stop Leak Can" and read the horror stories of what a $4 can of stop leak can introduced into an A/C system. I've seen it dozens of times in my career.

There's an old saying in the repair industry, there's nothing more expensive than a cheap shortcut.
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