🚗 Classic Fault — Mercedes-Benz W115 (1968–1976)
Steering box backlash — excessive free play
💰 Estimated Repair Cost
Up to $400 USD
Parts and labour estimate
🔧 Tools Required
Steering wheel play gauge
📋 Overview
The recirculating ball steering box develops backlash as the worm and nut wear. More than 30mm free play at the wheel rim indicates significant wear.
🩺 Symptoms
- Excessive steering wheel free play
- car wanders at highway speed
- frequent steering corrections needed
🔍 Possible Causes
- Worn steering box worm and nut
- box adjustment not set correctly
🛠️ Diagnosis Steps
Measure steering wheel free play at rim with wheels straight ahead. Should be under 15mm.
✅ Most Confirmed Fix
Adjust steering box backlash adjuster. If play cannot be corrected, recondition or replace.
70% of users confirm this fix worked (15 reports)
🏷️ Parts Needed
Steering box adjustment; reconditioned steering box if worn
🔗 Other Mercedes-Benz W115 Faults
Own a Mercedes-Benz W115?
Share your experience with this fault — or report a different issue. Your knowledge helps other classic car owners worldwide.