🚗 Classic Fault — Mercedes-Benz W115 (1968–1976)
Coolant hose perishing causing split under pressure
💰 Estimated Repair Cost
$30 – $80 USD
Parts and labour estimate
🔧 Tools Required
Hose clamp pliers
📋 Overview
Original or old-stock rubber coolant hoses harden and split without warning. A split hose causes rapid coolant loss and potential engine damage.
🩺 Symptoms
- Sudden coolant loss
- steam from engine bay
- rapid temperature rise
- visible split in hose
🔍 Possible Causes
- Aged or hardened coolant hose
- hose split under thermal cycling
- poorly fitted clamp cutting hose
🛠️ Diagnosis Steps
Inspect all hoses for hardness and surface cracking. Squeeze hoses — they should be pliable.
✅ Most Confirmed Fix
Replace all coolant hoses as complete set.
87% of users confirm this fix worked (32 reports)
🏷️ Parts Needed
Full coolant hose set for W115; stainless hose clamps
🔗 Other Mercedes-Benz W115 Faults
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