Mercedes-Benz E-Class (W212)
Front Left Air Strut 
ARNOTT A2123201938 (Strut ; Air Suspension)

Your advantage:
- 2 Years Warranty (against manufacturing defects)
- Quality product
- Cheaper than authorized repair
- Specialized technical advice
- Deliveries in 24h (unless out of stock at manufacturer)

Important:
- Make sure after repair that the system is absolutely leakproof, Any leak on the system compromises the functioning of components such as the suspension compressor.
- When you replace the air suspension compressor,you must  always change the relay before installing the new compressor even if it seems to still work.
- This is a specification by the car manufacturer.