🚗 Classic Fault — Mercedes-Benz W115 (1968–1976)
A-pillar and windscreen surround rust
💰 Estimated Repair Cost
$200 – $1000 USD
Parts and labour estimate
🔧 Tools Required
Angle grinder, welder, cavity injection equipment
📋 Overview
The A-pillar and windscreen surround trap water and corrode from inside. Bubbling paint at the A-pillar base indicates significant hidden rust inside the pillar section.
🩺 Symptoms
- Bubbling paint at A-pillar base
- rust staining from A-pillar
- paint lifting around windscreen surround
🔍 Possible Causes
- Water trapped in A-pillar cavity
- condensation
- previous repair not sealing cavity
🛠️ Diagnosis Steps
Probe any bubbled areas. Sound with knuckle — hollow thud confirms hollow rust.
✅ Most Confirmed Fix
Cut out corroded sections. Weld in new metal. Inject cavity wax. Repaint.
57% of users confirm this fix worked (10 reports)
🏷️ Parts Needed
A-pillar repair section; rust treatment; cavity wax
🔗 Other Mercedes-Benz W115 Faults
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