"CHECK ENGINE" MIL - Description of components - GF54.30-P-5011BK

MODEL 219 with ENGINE 113.967 with CODE (494) USA version 

MODEL 164.1 with ENGINE 113.964 with CODE (494) USA version up to Model Year 8 

MODEL 251 with ENGINE 113.971 with CODE (494) USA version up to Model Year 8 

Shows model 219 

Fig 1: Identifying Check Engine Indicator Lamp - Shown On Model 219

Courtesy of MERCEDES-BENZ USA

Location 

The "CHECK ENGINE" MIL is located in the instrument cluster.

Task 

The "CHECK ENGINE" MIL alerts the driver to emissions-relevant malfunctions.

Function 

The indicator lamp is actuated by the instrument cluster via a CAN message from the engine control unit. As a check of the function it lights up when the ignition is ON and for approx. 1 second as of an engine speed of approx. 500 RPM. The indicator lamp goes out if there is no fault present.