Problem Reports
Mercedes-Benz S320
Report: Emissions Air Injection Pumps Can Seize Up and Cause Noise/Smoke
Mercedes-Benz S320 Problem
6 Reports
Model Years Affected: 1994, 1995, 1996, 1997, 1998, 1999
Verified
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.