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Old 02-15-2003, 12:19 AM
Ginger97's Avatar
Registered User
Join Date: Feb 2003
Location: South Carolina
Posts: 27
Squeeling Belt

Hello, it's me again.

I have noticed the last few times it has rained, a belt is squeeling during acceleration. It is very annoying and of course, my teenage daughter is embarrassed.

BTW, Happy Valentine's Day!!!
1978 300SD
158,003 - 1st odometer
150,000 + - current odometer
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Old 02-15-2003, 06:43 PM
rdanz's Avatar
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Join Date: Sep 2002
Posts: 1,158
Check belt tightness also if there are any cracks replace belt.
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Old 02-16-2003, 02:57 AM
haasman's Avatar
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Join Date: Jun 2001
Location: San Francisco, CA
Posts: 3,096

When the engine is OFF, open the hood and look for the belts on your engine. Since there are several, you'll want to test the belt tension.

A non-scientific way to do it is to reach down and where the belt is mid-way between two pulleys, push down on it. Mercedes take a firm belt tension so therefore the deflection (how far it can be pushed down) should be less than 1/2 inch.

You can check the tension also at the alternator, by using its fins and try and turn the alternator. This done best when the car is completely cold, such as first thing in the morning. The alternator is on the lower right of the engine, or lower left if you are facing the engine.

'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)
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Old 02-16-2003, 11:18 PM
EricSilver's Avatar
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Join Date: Mar 2000
Location: Fairfax, VA
Posts: 1,210
Is the squealing recurrent, or does it happen just once then go away for the rest of the day?

If it is recurrent, you probably have some fluid leaking onto it, like Power Steering fluid or coolant.
2001 E430 4matic
122,xxx miles
Black/Charcoal Interior

Gone but not Forgotten:
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black
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