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.
1993 Mercedes Benz 300SDFACTORY OEM SERVICE PROCEDURE
Sensor Specifications
COOLANT TEMP SENSOR & INTAKE AIR TEMP SENSOR SPECIFICATIONS
| °F (°C) | Ohms | Volts At Socket |
|---|---|---|
| 68 (20) | 2500-2750 | 3.47-4.24 |
| 86 (30) | 1530-1870 | 3.12-3.82 |
| 104 (40) | 1062-1298 | 2.75-3.36 |
| 122 (50) | 750-916 | 2.37-2.89 |
| 140 (60) | 540-660 | 2.00-2.44 |
| 158 (70) | 396-484 | 1.67-2.04 |
| 176 (80) | 294-360 | 1.35-1.65 |
| 194 (90) | 219-267 | 1.10-1.34 |
| 212 (100) | 167-204 | .89-1.09 |
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.
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