Report: Emissions Air Injection Pumps Can Seize Up and Cause Noise/Smoke
Mercedes-Benz E320 Problem
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.
Visitor, 1994 Mercedes-Benz E320, 216,000 mi
Trying to find replacement part that does not cost too much! New, this part from mercedes is 1700!