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.
1989 Mercedes Benz 300CEFACTORY OEM SERVICE PROCEDURE
Trouble Code Identification
MALFUNCTION/TROUBLE CODE IDENTIFICATION
| Code/No. of Flashes | Malfunctioning Component | ||
|---|---|---|---|
| 1 | No System Malfunction | ||
| 2 | Throttle Valve Switch | ||
| 3 | Coolant Temperature Sensor | ||
| 4 | Airflow Sensor Position Indicator | ||
| 5 | Oxygen Sensor | ||
| 6 | Not Used | ||
| 7 | Td Signal | ||
| 8 | Altitude Correction Capsule | ||
| 9 | Electro-Hydraulic Actuator (Eha) | ||
| 10 | Throttle Valve Switch Idle Speed Contact | ||
| 11 | Not Used | ||
| 12 (1) | EGR Temperature Sensor | ||
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Factory Service Tools
Use the Manual With the Right Hardware
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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.