Audi A6 C7 4G Allroad Quattro
Front Left Leveling Sensor 
ARNOTT 4H0941285G (Level regulator ; Air Suspension)

Your advantage:
- 2 Years Warranty (against manufacturing defects)
- Quality product
- More 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.