squeak / creak due to engine hood / bonnet latches - Mercedes-Benz Forum

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Old 08-31-2006, 01:25 AM   #1 (permalink)
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Date registered: Jul 2006
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squeak / creak due to engine hood / bonnet latches

When I go over speed bumps or up my driveway, etc. at an angle I get a squeak sound similar to a "bird chirp".

Note: When my car was up on a rack most recently we tried everything to make the sound happen. By moving the suspension up and down,pushing, pulling, etc. to no avail. Moved the exhaust system. The sqeek would not make a noise. So we lightly sprayed WD40 everywhere that we could think of. That did not fix the problem.

I'm thinkin' sub-frame mounts but the car is at 21K miles and 6 years old.

Please help if you have a fix. It's driving me crazy.

Last edited by lynns; 05-30-2012 at 01:23 PM.
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Old 08-31-2006, 05:55 PM   #2 (permalink)
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Check Underbody Cross Braces

Hi Lynn:

I had a very similar chirp in my 2002 SL500. At first I thought it was my tires, but later it sounded like something in the chasis. I took the car into the dealer, who treated me fairly in the past, and he diagnosed it as:
Quote:
Tested car on rough roads, found that noise was coming from front and rear underbody cross braces. All braces mounting points were dry and dirty, R&R all four braces, cleaned and lubricated all mounting areas, drove car again, found noise to be gone.
I can't confirm the chirp is gone yet, as I can't hear it (or it doesn't happen) with the pano hard top on. I'll take the top off soon and see if it is really gone.
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Old 09-01-2006, 04:37 AM   #3 (permalink)
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Hi guys,
I think I have the similar sound that I think is coming from the center vents and it sounds in between a bird chirp and a stangled kid when I steer to the left in a tight corner a lil faster.
Could it be caused from some kind of mechanism or fan screeching in teh AC system?
Cheers.
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Old 09-01-2006, 04:22 PM   #4 (permalink)
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Not sure if this is it but I had two creaks driving me nuts sounded almost like what you are describing. It turned out one was the hood latch needing to be greased. The next was to replace the Stabalizer bar,connecting link and rubber bushings. Everything was great after that. Just a thought and something to check.

Last edited by lynns; 05-30-2012 at 01:26 PM.
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Old 09-04-2006, 04:41 PM   #5 (permalink)
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greased hood latches

Quote:
Originally Posted by undrctl
Not sure if this is it but I had two creaks driving me nuts sounded almost like what you are describing. It turned out one was the hood latch needing to be greased. The next was to replace the Stabalizer bar,connecting link and rubber bushings. Everything was great after that.
Well I greased two of my hood latches and it took care of my bird chirp sounds. This was especially noticable when entering my driveway at an angle or going over speed bumps at a slight angle. Makes sense if the body of the car is flexed.

Last edited by lynns; 10-26-2006 at 10:58 AM.
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Old 09-04-2006, 05:34 PM   #6 (permalink)
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Glad that info helped and more important saved you cash at the dealers.
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Old 09-05-2006, 01:42 AM   #7 (permalink)
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Mine instead seems to come from the dash vents....

Any ideas ?

Cheers.
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Old 10-25-2006, 08:11 PM   #8 (permalink)
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Chirp Is Gone

Quote:
Originally Posted by hotel_calif
I can't confirm the chirp is gone yet, as I can't hear it (or it doesn't happen) with the pano hard top on. I'll take the top off soon and see if it is really gone.
Pano top is off and the chirp is gone. The dealership (Escondido Mercedes) did a great job diagnosing and fixing this problem for me.
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Old 05-30-2012, 01:31 PM   #9 (permalink)
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Well here I am again. But this time I greased the hood latches, right away, and the squeak is gone.

Hope this helps someone else that expects that there Stealership does this as a part of an "A or B Service". They usually don't!
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Old 05-30-2012, 05:01 PM   #10 (permalink)
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I just did mine again, No more little birdie noises!!!!!!! This is such a simple thing to resolve, I just don't know why EVERYONE dosent lube these with each service!!!!
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