Noise and/or Smoke From Drive Belt Area on Mercedes-Benz 300SEL

The emissions air injection pump can seize, causing a loud squealing noise followed by smoke from the drive belt. If the engine is not turned off, the belt will break, turning on the alternator/battery warning light.

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Average mileage: (–)
2 model years affected: 1990, 1991
2 people reported this problem
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