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Engine makes loud noise

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Old Oct 19, 2010 | 10:14 PM
  #1  
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2004 c230k
Engine makes loud noise

So when my car is cold especially in the morning, it makes some loud noise when I reverse, but when the car is warmed up after a couple of minutes the noise is gone. Does anyone else have this problem or know what this may be?
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Old Oct 20, 2010 | 12:11 AM
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2006 C230 Sedan
Could be all sorts of issues. Pullies, alternator, SC, Belts, AC and these are just starters.

Perhaps you can post a clip of the noise, then some one here can give you a better idea or even a fix.
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Old Oct 20, 2010 | 12:17 AM
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probably some pulleys... belt tensioner, and/or the serpentine belt.

had the same issue, replaced s/c pulley, belt tensioner and the serpentine belt... problem solved.
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Old Oct 20, 2010 | 02:05 AM
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thnx and i think my best bet is to bring it to MB and have them check on it..
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Old Oct 20, 2010 | 02:08 AM
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I'm sure they are gonna charge you an arm and a leg for that. If it's as simple as a bad belt, the dealer is not necessary.
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Old Oct 20, 2010 | 02:16 AM
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Originally Posted by fookoo303
I'm sure they are gonna charge you an arm and a leg for that. If it's as simple as a bad belt, the dealer is not necessary.
yes, true but i was going to have them run a diagnostic and then figure something out after that...i think it is like +/-$300.
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Old Oct 20, 2010 | 04:03 PM
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Squeek noise (high pitch)? Lawnmower noise? What kind of noise?
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Old Oct 20, 2010 | 05:53 PM
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Yep we need to know what the noise sounds like. These cars are loud when cold due to secondary air injection - goes away when warm. That's normal. But we don't know what to tell you without a description.
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Old Oct 21, 2010 | 02:48 AM
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Originally Posted by Karo
Squeek noise (high pitch)? Lawnmower noise? What kind of noise?
well its almost like a squeaky noise and im gonna try to record it but not sure if i can post a video on here...
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Old Oct 21, 2010 | 02:53 AM
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Originally Posted by LILBENZ230
Yep we need to know what the noise sounds like. These cars are loud when cold due to secondary air injection - goes away when warm. That's normal. But we don't know what to tell you without a description.
well if that is it then that is what i am going through, but like i said to Kano...i will try to record the noise
Attached Thumbnails Engine makes loud noise-mb230.jpg  
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Old Jan 6, 2012 | 02:45 AM
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Originally Posted by chetoc230
probably some pulleys... belt tensioner, and/or the serpentine belt.

had the same issue, replaced s/c pulley, belt tensioner and the serpentine belt... problem solved.
Hi I'm curious when you replaced these parts, how much did it cost you and what was the mileage you had on that car? Thanks!
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