Part #03279
W116 450SEL 6.9 — Front and Centre spheres (3 required) W126 Option 487 — Centre sphere only (1 required)
A Febi Bilstein replacement nitrogen accumulator sphere for the Mercedes-Benz hydropneumatic self-levelling suspension system fitted to the W116 450SEL 6.9 and W126 models with option code 487 (Hydropneumatic Spring Suspension).
These spheres contain pressurised nitrogen gas separated by a diaphragm, acting as the spring element in the hydropneumatic suspension system. Over time the diaphragm deteriorates and the nitrogen charge is lost, resulting in a collapsed, harsh, or uneven ride. Replacement restores the system to correct ride height and compliance.
This is the Red sphere — identified as 'Red' in the
Mercedes-Benz EPC. The front and rear spheres are a different part
(A 126 320 13 15, identified as 'Blue') and are listed separately.
| Reference | Number |
|---|---|
| Febi Bilstein Part Number | 03279 |
| Mercedes Part Number | A 126 320 07 15 |
Mercedes part number variants (all refer to the same part):
A1263200715 · A126 320 0715 · A126 320 07 15 · A 1263200715 ·
A 126 320 0715 · A 126 320 07 15 · 1263200715 · 126 320 0715 ·
126 320 07 15
W116 (S-Class) 450SEL 6.9 — all vehicles
W126 (S-Class) All models fitted with Option Code 487 — Hydropneumatic Spring Suspension
Not all W126 vehicles have hydropneumatic suspension — confirm your vehicle has option code 487 before ordering. This can be verified via your vehicle's data card or by checking the suspension type physically.
| Location | Part | Qty per car |
|---|---|---|
| Front & Centre | A 126 320 07 15 — Red (this part) | 3 |
| Rear | A 126 320 13 15 — Blue | 2 |
| Total |
| 5 |
| Location | Part | Qty per car |
|---|---|---|
| Centre | A 126 320 07 15 — Red (this part) | 1 |
| Front & Rear | A 126 320 13 15 — Blue | 4 |
| Total | 5 |
For best results and to ensure even suspension performance,
replace all 5 spheres as a complete set. See our front and rear
sphere listing for A 126 320 13 15.
A 126 320 13 15)