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
Compression Specifications: Notes
COMPRESSION SPECIFICATIONS - 6-CYLINDER
| Application | Specification | ||
|---|---|---|---|
| Compression Ratio | 9.2:1 | ||
| Compression Pressure | (1) | ||
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COMPRESSION SPECIFICATIONS - V8
| Application | Specification | |
|---|---|---|
| Compression Ratio | 9.0:1 | |
| Compression Pressure | ||
| Normal | 123 psi (8.6 kg/cm2 ) | |
| Minimum | 109 psi (7.7 kg/cm2 ) | |
| Maximum Variation Between Cylinders | 22 psi (1.5 kg/cm2 ) | |
Factory Service Tools
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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.