Rear-Axle Steering: Factory Codes 201 vs 216
Understand the difference between standard and 10-degree rear-axle steering, why the exact angle depends on the model, and why verifying your specific factory code (201 or 216) is crucial before buying.
Decode Your VIN
The Technology: Two Tiers of Rear-Axle Steering
Rear-axle steering is one of the most transformative technologies available on modern Mercedes-Benz models, particularly the S-Class (W223), C-Class (W206), GLC, and the EQS and EQE. It allows the rear wheels to physically turn, fundamentally altering the vehicle's dynamic behavior. Mercedes typically offers this feature in two tiers, each tied to a specific factory option code.
Code 201 designates the standard rear-axle steering. Its maximum angle depends on the model: roughly 2.5 degrees on the C-Class and GLC, and up to 4.5 degrees on the S-Class, EQS and EQE. Code 216 represents the extended system with a rear steering angle of up to 10 degrees. The visual difference on the car's exterior is virtually indistinguishable when parked, yet the driving experience is significantly different.
Behind the Wheel: Low-Speed Agility and High-Speed Stability
The magic of rear-axle steering is that it effectively changes the wheelbase of the car on the fly. At low speeds (typically under 60 km/h), the rear wheels turn in the opposite direction to the front wheels. This reduces the turning circle—especially noticeable on long vehicles like the EQS or S-Class—making parking maneuvers and tight city navigation far easier. The 10-degree system (Code 216) excels here, cutting the turning circle by up to around 2 meters.
At higher speeds on the highway, the rear wheels turn in the same direction as the front wheels. This virtually extends the wheelbase, providing exceptional straight-line stability, smoother lane changes, and enhanced safety during evasive maneuvers. For driving enthusiasts, it also sharpens cornering response on winding roads.
VIN Verification: What Are You Really Buying?
When buying a used modern Mercedes-Benz, assuming a car has rear-axle steering just because it's a high-trim model is a costly mistake. Some buyers purchase an S-Class expecting the 10-degree steering system (Code 216), only to realize it either lacks the feature entirely or is limited to the standard angle (Code 201) due to incompatible factory wheel configurations, such as certain staggered AMG alloy setups.
Sellers rarely know the exact steering angle their car possesses, and visual inspections cannot reveal the system's mechanical limits. The only foolproof way to know exactly what system the vehicle left the factory with is by decoding the 17-character VIN.
By checking the official production record via FindMyExtras, you can instantly verify whether the car is equipped with Code 201, Code 216, or neither. For €1.99, you gain the certainty to negotiate the right price for the right technology.
| No Rear-Axle Steering | Standard (Code 201) | Extended (Code 216) | |
|---|---|---|---|
| Opposite steering below 60 km/h | |||
| Rear steering angle up to 10° | |||
| Turning circle reduction of ~2m | ~ |
Frequently Asked Questions
Is rear-axle steering standard on all new S-Class and EQS models?
Not always. While it may be standard on certain high-end trims or specific markets, it remains an optional extra (Sonderausstattung) for many configurations. Always check the datacard.
Can I upgrade the standard angle to 10 degrees?
On some models and markets, Mercedes offers an over-the-air (OTA) subscription that unlocks the 10-degree angle. However, this depends on the car's physical hardware, as certain staggered wheel and tyre combinations prevent the full 10-degree turn.
How can I tell which rear-axle steering system a car has?
The physical differences are difficult to spot visually when the car is stationary. The only reliable method is checking the factory option codes (Code 201 or 216) via a VIN decode.
Does rear-axle steering require special maintenance?
The system is generally robust and integrated into the vehicle's electronics, but it does add moving parts and actuators to the rear axle. A full suspension diagnostic is recommended if a warning message appears on the dashboard.