How to Replace Front Lower Rear Control Arm on Mercedes S-Class W221 (2012)

In this video, I demonstrate how to remove and replace the front lower rear control arm on a Mercedes W221 S-Class 2012.
This suspension arm is known to develop wear and knocking due to bush or ball joint failure, causing vibration, uneven tyre wear, or poor steering control.

The tutorial covers how to safely lift the vehicle, remove the old arm, fit the new replacement part, and correctly torque the bolts.

🔧 What You Will Learn

Safe jacking and support points on Mercedes W221

Wheel removal and suspension access tips

Removing worn control arm and bush assembly

Installing new suspension arm correctly

Preventing common mistakes and alignment considerations

🚗 Compatible Models

✔ Mercedes S-Class W221 (2006–2013)
✔ S320 / S350 / S500 / S550 / S600 / AMG variants
✔ Similar process for W216 CL-Class

⚠️ Health & Safety Tips

Always use axle stands — never rely on the jack alone

Wear gloves and eye protection

Keep hands clear of pinch points around suspension arms

Torque all bolts to manufacturer specification

Get a wheel alignment / tracking check after installing new arms

🛠 Tools & Parts Used

Front lower rear control arm set (W221 compatible): https://amzn.to/4olJOaz

Torque wrench & breaker bar: https://amzn.to/4ilvmOh

Penetrating oil / wd40: https://amzn.to/49N7cdz

Ratchet socket set: https://amzn.to/48lJByg

Pry bar: https://amzn.to/4ofYHuT

Trolley jack: https://amzn.to/3XnXAym

Gloves: https://amzn.to/3M0ISLk

📢 Affiliate & Work Disclaimer

This video contains affiliate links which may earn a small commission at no extra cost to you.
All repairs, modifications and maintenance work shown are carried out entirely at your own risk.
The creator accepts no responsibility for personal injury, vehicle damage, or incorrect use of tools or parts.
If you are not confident, please consult a qualified mechanic.

🔖 Hashtags

#mercedes #sclass #w221 #suspension #controlarm #carrepair #maintenance #DIYmechanic #autocare #mechanic #mercedesbenz
In this video I have this 2012 Mercedes S350 w221, and I will be changing the front lower rear control arm, in this case the passenger side, but by the time I finish editing I have also done the driver side and will be showing how to to the torque tightening sequence.
Please do comment if the torque settings are not correct as I found it hard to gather the information.

#mercedessclass #mercedesw221 #w221 #sclass #bilsten