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Brake fade when hot — drum brake rear — Mercedes-Benz W115 (1968–1976) | MyCarFault
🚗 Classic Fault — Mercedes-Benz W115 (1968–1976)

Brake fade when hot — drum brake rear

🟡 Partial Fix Easy 🏁 Original spec 2 hrs
Community fix rate — 8 confirmed fixes
65% success rate
💰 Estimated Repair Cost
$30 – $100 USD
Parts and labour estimate
🔧 Tools Required
Drum brake tools, micrometer, brake cleaner
📋 Overview

Rear drum brakes lose effectiveness after repeated hard stops or mountain descents. The W115 uses drum brakes at the rear which are susceptible to fade when overheated.

🩺 Symptoms
🔍 Possible Causes
🛠️ Diagnosis Steps
  1. Allow brakes to cool completely.
  2. Remove drums.
  3. Measure drum diameter — maximum oversize 1mm over standard.
  4. Inspect linings minimum 2mm.
  5. Check for oil contamination.
Most Confirmed Fix

Replace rear brake linings. Machine or replace drums. Use high-temperature brake lining material.

65% of users confirm this fix worked (8 reports)
🏷️ Parts Needed

Rear brake lining set; brake drum; wheel cylinder kit

🔗 Other Mercedes-Benz W115 Faults


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