🚗 Classic Fault — Mercedes-Benz W115 (1968–1976)
Dipstick tube O-ring leak
💰 Estimated Repair Cost
$5 – $15 USD
Parts and labour estimate
🔧 Tools Required
Seal pick tool
📋 Overview
The dipstick tube O-ring seal where it enters the engine block hardens and allows oil to seep down the tube exterior, often mistaken for a more serious sump or rear seal leak.
🩺 Symptoms
- Oil seeping around dipstick tube base
- oily residue on block near dipstick
- oil drips from front of engine
🔍 Possible Causes
- Hardened dipstick tube O-ring
- loose dipstick tube
✅ Most Confirmed Fix
Replace dipstick tube O-ring. Carefully pull tube, replace ring, refit.
89% of users confirm this fix worked (37 reports)
🔗 Other Mercedes-Benz W115 Faults
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