🚗 Classic Fault — Mercedes-Benz W108/W109 (1965–1972)
W108 D-Jetronic fuel injection warm start failure
💰 Estimated Repair Cost
$80 – $300 GBP
Parts and labour estimate
🔧 Tools Required
D-Jetronic pressure gauge, multimeter
📋 Overview
The Bosch D-Jetronic system on the 280SE relies on a pressure sensor and ECU that age poorly. Warm restarts are commonly difficult.
🩺 Symptoms
- Engine cranks but will not start when warm
- starts fine when cold
- may require 30+ seconds of cranking hot
🔍 Possible Causes
- Failed D-Jetronic pressure sensor
- failed ECU capacitors
- poor injector residual pressure
🛠️ Diagnosis Steps
Test system pressure with gauge. Have ECU recapped. Check cold start injector is not leaking.
✅ Most Confirmed Fix
ECU recap and pressure sensor replacement
80% of users confirm this fix worked (14 reports)
🔗 Other Mercedes-Benz W108/W109 Faults
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