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Blocked fuel filter causing lean misfire under load — Mercedes-Benz W115 (1968–1976) | MyCarFault
🚗 Classic Fault — Mercedes-Benz W115 (1968–1976)

Blocked fuel filter causing lean misfire under load

🟢 Solved Beginner 🏁 Original spec 0.3 hrs
Community fix rate — 55 confirmed fixes
92% success rate
💰 Estimated Repair Cost
$5 – $15 USD
Parts and labour estimate
🔧 Tools Required
Bucket, rag, hose clamp
📋 Overview

An original or long-life fuel filter that has not been replaced restricts fuel flow to the carburetors at higher RPM and under load, causing lean misfiring.

🩺 Symptoms
🔍 Possible Causes
🛠️ Diagnosis Steps

Check fuel filter visually. Test flow by disconnecting outlet side — gravity flow should be strong.

Most Confirmed Fix

Replace fuel filter. Check in-tank mesh strainer on fuel tap.

92% of users confirm this fix worked (55 reports)
🏷️ Parts Needed

Inline fuel filter

🔗 Other Mercedes-Benz W115 Faults


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