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.
2002 Mercedes Benz ML55FACTORY OEM SERVICE PROCEDURE
Fuel Pump
FUEL PUMP VOLUME
| Application | Min. Vol. In 35 Sec. Qts. (L) | ||
|---|---|---|---|
| 2.3L (4-Cyl.), 2.6L (V6), 3.2L (V6), 4.3L (V8), 5.0L (V8), 5.5L (V8) & 6.0L (V12) | 1.1 (1) | ||
| 5.8L (V12) | (1) | ||
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FUEL PRESSURE
| Application | psi (bar) | |||
|---|---|---|---|---|
| 2.3L (4-Cyl.), 2.6L (V6), 3.2L (V6), 4.3L (V8), 5.0L (V8) & 5.5L (V8) | 54-61 (3.7-4.2) | |||
| 5.8L (V12) | (1) | |||
| 6.0L (V12) | ||||
| Idling With Vacuum | 46-52 (3.2-3.6) | |||
| Idling Without Vacuum | 54-61 (3.7-4.2) | |||
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FUEL SYSTEM REST PRESSURE
| Application | psi (bar) | |||
|---|---|---|---|---|
| 2.3L (4-Cyl.), 2.6L (V6), 3.2L (V6), 4.3L (V8), 5.0L (V8), 5.5L (V8) & 6.0L (V12) | ||||
| Immediately After Engine Off | More Than 44 (3.0) | |||
| After 30 Minutes | More Than 36 (2.5) | |||
| 5.8L (V12) | (1) | |||
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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.