🚗 Classic Fault — Mercedes-Benz W116 (1972–1980)
W116 450SEL 6.9 hydropneumatic suspension sphere failure
💰 Estimated Repair Cost
$100 – $600 GBP
Parts and labour estimate
🔧 Tools Required
Hydropneumatic pressure gauge, sphere tools
📋 Overview
The self-levelling hydropneumatic suspension relies on nitrogen-charged spheres that lose pressure over time, causing the car to sit low.
🩺 Symptoms
- Car sits very low on one or more corners
- poor ride quality
- car leans to one side
- suspension warning light
🔍 Possible Causes
- Failed suspension sphere
- low hydraulic fluid
- failed pump
🛠️ Diagnosis Steps
Check ride height — should be level. Pressurise system and check each sphere with pressure gauge
✅ Most Confirmed Fix
Sphere replacement and system recharge
82% of users confirm this fix worked (18 reports)
🔗 Other Mercedes-Benz W116 Faults
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