🚗 Classic Fault — Mercedes-Benz W115 (1968–1976)
Sunroof drain tubes blocked — headlining water damage
💰 Estimated Repair Cost
$10 – $50 USD
Parts and labour estimate
🔧 Tools Required
Drain clearing wire, compressed air
📋 Overview
On W115 models with a sunroof, four drain tubes carry water from the sunroof seal area down through the pillars. When blocked, water overflows and saturates the headlining.
🩺 Symptoms
- Water dripping from interior trim
- wet headlining
- stained or bulging headlining
- water in footwells
🔍 Possible Causes
- Blocked sunroof drain tubes
- kinked or disconnected drain tubes
🛠️ Diagnosis Steps
Pour small amount of water into sunroof gutter channel. Water should drain rapidly. No drainage confirms blockage.
✅ Most Confirmed Fix
Clear drain tubes with soft wire or compressed air.
80% of users confirm this fix worked (20 reports)
🔗 Other Mercedes-Benz W115 Faults
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