🚗 Classic Fault — Mercedes-Benz (1968–1976)
W114 280E D-Jetronic ECU capacitor failure
💰 Estimated Repair Cost
$60 – $200 GBP
Parts and labour estimate
🔧 Tools Required
ECU recapping service or soldering skills
📋 Overview
The early Bosch D-Jetronic ECU fitted to the 280E uses electrolytic capacitors that fail after 40+ years, causing injection faults.
🩺 Symptoms
- Engine runs rich or lean with no apparent cause
- rough idle
- hesitation
- fault cannot be found in fuel or mechanical systems
🔍 Possible Causes
- Failed ECU capacitors
- failed pressure sensor
- poor ECU ground connection
🛠️ Diagnosis Steps
Send ECU for capacitor replacement (recapping). Check ECU ground strap to body is clean and tight
✅ Most Confirmed Fix
ECU capacitor replacement (recapping)
85% of users confirm this fix worked (18 reports)
🩺 Related Symptoms
🔗 Other Mercedes-Benz Faults
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