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.
1986 Mercedes Benz 560SECFACTORY OEM SERVICE PROCEDURE
Cis-E System
- Description
- Operation
- On-Board Diagnostic Readout System
- Fuel Pump Relay
- Cold Start Valve Activation
- Fuel Enrichment
- Maximum Rpm Limitation
- Fuel Pump
- Diaphragm Pressure Regulator
- Fuel Distributor Unit
- Coolant Temperature Sensor
- Electronic Control Unit (Ecu)
- Idle Speed Control Unit
- Idle Speed Air Valve
- Voltage Protection Relay (VPR)
- Oxygen Sensor
- Lambda Control
- Logic Circuit
- Fixed Operating Mode
- EZL Ignition Operation
- Trouble Shooting
- Diagnostic Testing
- Component Testing
- Wiring Diagrams
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.