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.
2001 Mercedes Benz CL55FACTORY OEM SERVICE PROCEDURE
Engine Compression
COMPRESSION SPECIFICATIONS
| Application (1) | Specification | |||||
|---|---|---|---|---|---|---|
| Compression Pressure | ||||||
| Low Compression Engines | ||||||
| C240, CL500, CLK320, CLK430, E320, E430, ML320, ML430 & SL500 | ||||||
| Normal | 145-174 psi (10-12 bar) | |||||
| Minimum | 109-153 psi (8 bar) | |||||
| Standard Compression Engines | ||||||
| C320, CL500, CLK320, CLK430, E320, E430, ML320, ML430, S430, S500, SL500 & SLK320 | ||||||
| Normal | 174-203 psi (12-14 bar) | |||||
| Minimun | 131 psi (9 bar) | |||||
| CLK55, E55 & ML55 | ||||||
| Normal | 160-189 psi (11-13 bar) | |||||
| Minimun | 145 psi (10 bar) | |||||
| Maximum Difference Between Cylinders | ||||||
| All Models | 22 psi (1.5 bar) | |||||
|
||||||
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.