🚗 Classic Fault — Mercedes-Benz W115 (1968–1976)
Sump gasket oil leak
💰 Estimated Repair Cost
$20 – $60 USD
Parts and labour estimate
🔧 Tools Required
Socket set, torque wrench, gasket scraper
📋 Overview
The sump gasket on the M115 is a common source of oil leaks on high-mileage engines. The original cork gasket compresses and allows weeping from the sump rail.
🩺 Symptoms
- Oil drips under engine after parking
- burning oil smell from hot exhaust
- low oil level
🔍 Possible Causes
- Compressed or failed sump gasket
- loose sump bolts
🛠️ Diagnosis Steps
Clean sump area thoroughly. Monitor for oil origin after cleaning.
✅ Most Confirmed Fix
Replace sump gasket. Use RTV at corners. Torque bolts evenly to 10 Nm.
84% of users confirm this fix worked (30 reports)
🏷️ Parts Needed
Sump gasket (quality silicone-cork type)
🔗 Other Mercedes-Benz W115 Faults
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