🚗 Classic Fault — Mercedes-Benz W115 (1968–1976)
Steel fuel line internal corrosion shedding particles
💰 Estimated Repair Cost
$60 – $200 USD
Parts and labour estimate
🔧 Tools Required
Pipe bending and flaring tools
📋 Overview
The original steel fuel lines corrode internally, shedding rust particles that block the fuel filter and damage the carburetor pump. External inspection may show no issue.
🩺 Symptoms
- Recurring fuel filter blockage
- brown particles in fuel filter
- carburetor pump wear
🔍 Possible Causes
- Internal corrosion of steel fuel lines
- rust particles in fuel system
🛠️ Diagnosis Steps
Cut a small section of old fuel line and inspect bore — rust scale inside confirms replacement.
✅ Most Confirmed Fix
Replace all steel fuel lines with copper-nickel tubing.
71% of users confirm this fix worked (15 reports)
🏷️ Parts Needed
Copper-nickel fuel line set; compression fittings
🔗 Other Mercedes-Benz W115 Faults
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