Cheap Mercedes-Benz GLS Steering Box

The GLS uses a rack-and-pinion steering system, not a traditional recirculating-ball steering box — so a standalone 'steering box' as found on older or heavier vehicles does not exist on this model. What you are most likely looking for is the steering rack (also called the steering gear or steering rack assembly), which is the correct part for the GLS. When searching or requesting quotes from a breaker, ask specifically for the steering rack to get the right results.

The GLS spans two generations: the first-generation X166 ran from 2016 to 2019, and the second-generation X167 launched for 2020 onwards — these are substantially different vehicles with different steering systems, so a rack from a 2016 X166 is very unlikely to fit a 2020 X167. Even within the X166 generation, engine variants (particularly the larger AMG-line and V12 engines) may have had different rack specifications, so always confirm the part against your exact registration with the breaker. Never assume cross-generation fitment.

Trim level alone — such as AMG Line versus standard — does not typically change the steering rack fitted to the GLS, as trim differences relate to cosmetics and interior appointments rather than running gear. What does matter more is the engine variant and whether your vehicle has the active steering or rear-axle steering options, which were available on certain GLS models and would mean a different or additional component. Confirm the exact steering rack specification with the breaker using your registration number to account for any option-dependent differences.

Both the 350d and 400d are diesel variants of the GLS, but they have different engine outputs and the 400d is a heavier, more powerful unit, which can influence the specification of steering components. It is possible the racks differ, and this is exactly the kind of detail you should confirm with the breaker against both registration numbers rather than assume compatibility. Do not assume that two diesel GLS variants share the same rack without verification.

The GLS moved from the first-generation X166 (2016–2019) to the second-generation X167 (2020–present), and yes, this matters significantly — the two generations are entirely different platforms with different steering assemblies that will not interchange. If your vehicle is a 2019 X166, a rack from a 2020 X167 will not be a direct fit, and vice versa. Always tell the breaker your exact year and registration so they can source from the correct generation.

The GLS 63 AMG is a high-performance, high-output variant and may carry a different steering rack specification compared to the standard diesel or petrol GLS models, given the significant difference in engine size and vehicle weight. Swapping AMG components onto a non-AMG vehicle can also raise compatibility issues with other steering and suspension parts. Confirm with the breaker whether the AMG rack is a match for your specific vehicle before purchasing.