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.
Fuel Supply System Safety Precautions
Fuel lines are under pressure.
Danger of personal injury to eyes and skin.
Wear protective eyewear and protective clothing in order to avoid injury and contact with the skin. Wrap a cloth around the connection before loosening hose connections. Open the connection carefully and release the pressure.
For safety reasons, switch off the current to the fuel pump before opening the fuel system. Otherwise, the fuel pump will activate when the driver door opens or when the ignition switches on. It is possible to interrupt the current flow by using one of the following possibilities:
- Disconnecting the battery
or
- Remove the Transfer Fuel Pump -G6- fuse.
or
- Disconnect the connector on the fuel delivery unit flange.
Always observe the following when removing and installing the fuel level sensor or the fuel pump (fuel delivery unit) from full or partially filled fuel tanks.
- Before starting work, switch the exhaust extraction system on and place an extraction hose close to the fuel tank installation opening to extract fuel fumes. If no exhaust extraction system is available, a radial fan (as long as motor is not in air flow) with a displacement greater than 15 m3 /h can be used.
- Do not let fuel come in contact with bare skin. Wear fuel-resistant gloves.
Note the following whenever working inside the engine compartment due to limited space:
- Route all lines and cables in their original locations.
- Ensure sufficient clearance to all moving or hot components.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.