Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1997 Mercedes Benz SL320FACTORY OEM SERVICE PROCEDURE
Symptom Diagnostics
For symptom diagnostics, 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 3.
- Transition failure when warm or increased fuel consumption. See Fig 3.
- Engine vibrates. See Fig 3.
- EA is in "limp home" mode. See Fig 3.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.