Symptom Diagnostics

For symptom diagnosis chart reference, refer to the following list:

• Engine starts and accelerates poorly when cold. See Fig 1.
• Engine does not start. See Fig 1.
• Engine has uneven idle. See Fig 1.
• Engine has insufficient output. See Fig 2.
• Engine runs unevenly (shakes). See Fig 2.
• Engine runs unevenly (misfiring). See Fig 2.
• Engine surges after cold start. See Fig 2.
• Transition failure during warm up. See Fig 2.
• Transition failure when warm or increased fuel consumption. See Fig 3.
• Engine bucks, jerks. See Fig 3.
• EA is in "limp home" mode. See Fig 3.

Fig 1: Symptom Diagnostics (1 Of 3)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Symptom Diagnostics (2 Of 3)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 3: Symptom Diagnostics (3 Of 3)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.