Mercedes-Benz 300E 4MATIC Problem Report
Mercedes-Benz 300E 4MATIC Noise and/or Smoke From Drive Belt Area
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.
After filling with trans fluid, I start engine, begin to drive and notice a great deal of smoke...