Mercedes-Benz ML W164 / GL X164 / R-Class / S-Class W221 2005–2014 Power Steering Rack 1644600125

Product overview

This replacement power steering gear rack assembly suits a range of Mercedes-Benz SUVs, people movers and luxury sedans, including the M-Class (W164), GL-Class (X164), R-Class and S-Class (W221). It is cross-referenced to OE numbers 1644600125, 1644600005, 1644600225, 1644600300 and 2214605100. Leaks from the rack seals, a clunk when turning or vague steering feel are common signs that replacement is due.

Vehicle compatibility

Listed fitment data contains 42 rows. Examples include the M-Class ML 280 CDI, ML 320 CDI, ML 350, ML 420 CDI, ML 500 and ML 63 AMG 4-matic (2005–2011); GL 320 CDI, GL 350 CDI, GL 420 CDI, GL 450 and GL 500 4-matic (2006–2012); R-Class R 280 to R 500 and R 63 AMG, including CDI and 4-matic versions (2005–2014); and the S 450 / S 450 L (2005–2013). Further variants appear in the full table. Confirm the number on your existing rack or your VIN before ordering.

Key features

• Complete power steering rack assembly
• Five OE-reference numbers for accurate cross-referencing
• Customers select the power source type when ordering
• Front axle steering system component
• New replacement unit

Technical specifications

Installation requirements

Fitting a steering rack is a safety-critical job and should be done by a qualified technician. The system must be bled correctly, tie-rod ends adjusted or replaced, and a wheel alignment completed afterwards. Steering angle sensors may require calibration on some vehicles.

Fitment checks before ordering

These vehicles were built in both left- and right-hand-drive forms and Australian and NZ cars require a right-hand-drive rack. Confirm by OE number or VIN before ordering, and check that the supplied unit matches your drive side.

Package inclusions

1 x power steering rack assembly per box for the selected option. Fluid, seals and mounting hardware are not included unless stated.

Shipping information

Shipped from China to customers in Australia and New Zealand. Freight is calculated at checkout based on your delivery address, and actual freight is confirmed at the time of order.

Special Order Item

This product is a special-order item sourced specifically for your vehicle. Please allow an estimated lead time of 3-4 weeks for sourcing and delivery. Lead times are estimates and may vary depending on supplier availability, order processing, and international shipping. We recommend confirming availability before placing your order.