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.
1987 Mercedes Benz 260EFACTORY OEM SERVICE PROCEDURE
Deceleration Shutoff Check
- Start engine and bring to operating temperature. Ensure control valve on fuel gauge is open. Briefly increase engine speed to 2500 RPM. As engine speed drops, lower chamber pressure should increase by 5.8 psi (.4 kg/cm2 ).
- Fuel delivery should start again at 900 RPM. If either pressure or engine speed reading is incorrect, test throttle valve microswitch, control current to differential pressure regulator, ECU, and TD ignition signal.
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.