Operation CHARM
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Mercedes Benz
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1990
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300SL (129.061) L6-3.0L (104.981)
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Repair and Diagnosis
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Specifications
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Mechanical Specifications
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Heating and Air Conditioning
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Compressor HVAC
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System Specifications
System Specifications
On the 190E 2.3L, 420SEL, and 560SEC, SEL & SL models, A/C compressor belt tension is 110 lbs on new belts, and 88-99 lbs. on used belts. On all other models, the belt tension is maintained by an automatic belt tensioner.