🚗 Classic Fault — Mercedes-Benz W115 (1968–1976)
Breather system blocked causing crankcase pressure
💰 Estimated Repair Cost
$10 – $30 USD
Parts and labour estimate
🔧 Tools Required
Compressed air
📋 Overview
When the crankcase breather pipe blocks with sludge, crankcase pressure rises and forces oil out past every seal and gasket simultaneously.
🩺 Symptoms
- Multiple oil leaks appearing suddenly
- oil mist from dipstick
- oil filler cap hard to remove
🔍 Possible Causes
- Blocked crankcase breather pipe
- sludge from long oil change intervals
🛠️ Diagnosis Steps
Disconnect breather pipe at each end. Check for blockage by blowing through.
✅ Most Confirmed Fix
Clean or replace breather pipe and filter.
83% of users confirm this fix worked (24 reports)
🏷️ Parts Needed
Breather pipe; breather filter
🔗 Other Mercedes-Benz W115 Faults
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