E-Class (W211) 2003-2009

Front brake line caught on CV boot. Motor mount?

Old May 9, 2022 | 01:47 PM
  #1  
DetroitMerc's Avatar
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W211 E320 4matic wagon
Front brake line caught on CV boot. Motor mount?

This is the second time this has happened. The first time was during hard acceleration while turning to the right. Today was hard acceleration in a straight line. Immediately after I hear a ticking noise. It's rhythmic with wheel speed.
The brake line is being pushed down into the CV boot. I was able to push the brake line back up.
I'm thinking I have a worm motor mount, allowing the engine rock up and the teeth on the CV boot coming in contact with the brake line and pulling it down.
Am I on the right track?

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Old May 12, 2022 | 04:50 AM
  #2  
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I think so, as this is the hard line. Easy to check, have someone sit in the car, and manipulate the throttle while the hood is open and your can see the engine rock back and forth.
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Old May 13, 2022 | 07:34 PM
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That's also pretty far down. Are you sure you're not missing a clip holding it up or a spring isn't broken causing the car to sit lower? At least you look like you're in luck and haven't damaged the boot.
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Old May 14, 2022 | 11:00 AM
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W211 E320 4matic wagon
Originally Posted by cetialpha5
That's also pretty far down. Are you sure you're not missing a clip holding it up or a spring isn't broken causing the car to sit lower? At least you look like you're in luck and haven't damaged the boot.
This happened once before. I do have access to a full garage so I put it on the lift. I was able to push the brake line back up to place so it was sitting as close to the frame as possible, without potentially rubbing on the frame.
I had a little motion when pressing the gas while holding the brakes. I think I just need to try that again with more throttle to see if it really moves enough to contact the line when it's in it's normal position.
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Old May 15, 2022 | 02:45 PM
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W211 E320 4matic wagon
Tried pressing the gas while in gear and holding the brake again. This time in a parking lot. Last time was in the garage so I may not have given enough pedal due to concerns about hitting something.
I got a lot of movement, enough to pop the intake tube off.
New motor and trans mounts ordered.
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