Frequently Asked Questions
Find answers to common questions about our products and services
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We offer a 14-day return policy for all unused items in original packaging.
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Yes, we ship to most countries worldwide.
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- This warranty covers all eligible products purchased through our website for 6 months from the date of purchase.
Frequently Asked Questions
Is this mount for the Left or Right side of the engine?
This specific part number (A2122405017) is designed exclusively for the Front Right side of the engine. On Left-Hand Drive (LHD) vehicles, this is the Passenger's side. The left and right mounts are tuned and shaped differently, meaning they cannot be swapped.
Why do these hydraulic mounts fail?
Modern Mercedes engine mounts are filled with a specialized dampening fluid. Over time, the constant torque of the engine combined with extreme heat from the nearby exhaust causes the rubber to weaken and crack. Once the fluid leaks out, the mount collapses, resulting in metal-on-metal vibration.
Do I need to replace both the left and right mounts at the same time?
It is highly recommended to replace your engine mounts in pairs. Since both mounts support the weight of the engine and endure identical heat cycles, if the right side has failed, the left side (A2122404917) is almost certainly at the end of its lifespan. Replacing just one will put excessive stress on the new mount.
Will this fit a W212 with 4MATIC (All-Wheel Drive)?
Fitment varies greatly based on the drivetrain. Mercedes typically uses different engine mounts for Rear-Wheel Drive (RWD) versus 4MATIC models to accommodate the front axles. Please verify your vehicle's VIN prior to purchase to ensure this standard mount fits your specific configuration.





