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Symptoms of bad Valve Block

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E-Class (W211) 2003-2009

Symptoms of bad Valve Block

 
Old 03-05-2019, 03:00 PM
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2000 E320, 1997 E420, 2007 E550, 2009 E350
What did you use to inflate

I have built my bypass valve but I am having trouble inflating the strut. What did you use as an air source for inflating?
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Old 03-05-2019, 09:04 PM
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I used a compressor that I have in my garage. You need some higher psi I think mine is rate at 125psi. I wouldnít be surprised if you could use one from the gas station to make it happpen. Also helps to jack up the car so it doesnít have to lift it up while inflating


Originally Posted by georgiabenz View Post
I have built my bypass valve but I am having trouble inflating the strut. What did you use as an air source for inflating?
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Old 03-10-2019, 02:23 PM
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So after testing the front right strut, turns out it was defective. Called Arnott, they were super helpful, sent me out a new one under warranty. Swapped it out Friday and so far all is well. Car rides great and maintains its level overnight. Thanks everyone for the help in diagnosing this!
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Old 03-10-2019, 11:55 PM
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Glad to hear you got it all sorted out! Did you end up using the bypass valve to test it?
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Old 03-11-2019, 10:58 AM
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I am having trouble getting air into the strut with my bypass valve. I am using a garage compressor rated at 150 PSI. I stumbled across a video that showed a mechanic applying 12 volts to the electrical connector on the strut (NOT the computer side) to open the valve. I have a 2007 E550 so it may work differently than yours.
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Old 03-12-2019, 07:50 AM
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Originally Posted by 2010-s550 View Post
Glad to hear you got it all sorted out! Did you end up using the bypass valve to test it?
I couldn't get the bypass valve to work, but I ended up making basically a plug with an old air fitting since most of the air was trapped in the strut when I disconnected the air line, and overnight the strut leaked down so I knew that the strut must be the issue.
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Old 03-16-2019, 03:37 PM
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Car does not lower

Iím getting the visit workshop sign, car does not lower at all idk where to start! Can valveblock cause this?
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Old 05-14-2019, 12:30 AM
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What size lines did you buy? I have a 2000 S500 and I need to make one of these





Originally Posted by 2010-s550 View Post

Have you thought about testing to make sure the strut itself isnít leaking? I just did that yesterday and my front right needs to be replaced. Itís actually tricky to find out how to do it online but itís really easy...essentially you are just isolating the strut from the system to make sure it holds pressure and has no leaks. Take a look at page 29 of the PDF I attached in my previous post.



It it shouldnít cost you more than $10-$15 to make it you can use it to fill the strut and monitor the PSI level to ensure itís not leaking. I was able to find all the parts on amazon with next day delivery. Lemme know if you need any help!
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