How to change shock absorber and coil springs on MB W124: Replacing the shock absorbers and coil springs on a Mercedes-Benz W124 (often referred to simply as the Mercedes 124) is a relatively complex task and requires mechanical expertise. This procedure involves disassembling and reassembling a significant portion of the vehicle’s suspension system. Here’s a general overview of the steps involved:
Tools and Materials You May Need:
- Shock absorber and coil spring assembly (new)
- Spring compressors
- Socket set and wrenches
- Torque wrench
- Jack and jack stands
- Pry bar or ball joint separator
- Safety equipment (gloves, safety glasses)
Procedure:
- Safety Precautions:
- Ensure the vehicle is parked on a flat, stable surface, the engine is turned off, and the handbrake is engaged.
- Wear safety gloves and glasses to protect your hands and eyes.
- Raise the Vehicle:
- Lift the front or rear of the vehicle using a suitable jack and secure it with jack stands. Make sure the vehicle is safely supported.
- Remove the Wheel:
- Remove the wheel from the corner of the vehicle where you’ll be replacing the shock absorber and coil spring.
- Disconnect Components:
- Disconnect any components that attach to the shock absorber or coil spring, such as brake lines, ABS sensors, sway bar links, and the stabilizer bar, if present.
- Disconnect the Shock Absorber:
- Use a socket set and wrenches to disconnect the upper and lower mounting bolts or nuts for the shock absorber. This may require using a ball joint separator or a pry bar to free the lower control arm from the shock absorber.
- Remove the Coil Spring:
- Use a spring compressor tool to compress the coil spring, allowing you to remove it safely without tension. Carefully disconnect the coil spring from the upper and lower spring seats.
- Install the New Coil Spring:
- Place the new coil spring into the spring seats, ensuring it’s correctly positioned and aligned.
- Reconnect the Shock Absorber:
- Reattach the shock absorber to the vehicle’s suspension components, using the upper and lower mounting bolts or nuts. Make sure the shock absorber is securely in place.
- Reconnect Components:
- Reconnect any components you detached earlier, such as brake lines, ABS sensors, sway bar links, and the stabilizer bar.
- Tighten All Fasteners:
- Using a torque wrench, tighten all the mounting bolts and nuts to the manufacturer’s specifications.
- Repeat for Other Side:
- If you’re replacing the shock absorbers and coil springs on both sides of the vehicle, repeat the above steps for the other side.
- Reinstall the Wheel:
- Carefully reinstall the wheel and tighten the lug nuts.
- Lower the Vehicle:
- Carefully lower the vehicle to the ground.
- Perform Alignment and Testing:
- After replacing the shock absorbers and coil springs, it’s essential to have a wheel alignment performed to ensure proper wheel alignment. Test the vehicle for proper suspension performance and handling characteristics.
Replacing shock absorbers and coil springs on a Mercedes W124 is a complex task and should be performed by experienced mechanics or technicians. Improper installation can affect the vehicle’s handling, safety, and ride comfort. If you’re not confident in your ability to perform this task, it’s highly recommended to seek professional assistance.
1. How Do I Change the Shock Absorber and Coil Springs on a MERCEDES W124?
To change the shock absorber and coil springs on a MERCEDES W124, you will need to lift the car, remove the wheels, and access the suspension components. Begin by unbolting the old shock absorbers and coil springs, then replace them with the new parts, ensuring they are securely fitted. It’s important to follow the manufacturer’s torque specifications and check the condition of surrounding components. If you’re unfamiliar with suspension work, it’s advisable to seek professional assistance.
2. What Tools Are Needed to Replace Shock Absorbers and Coil Springs on a MERCEDES W124?
When replacing shock absorbers and coil springs on a MERCEDES W124, essential tools include a car jack, jack stands, a wrench set, spring compressors, and a socket set. You’ll also need a torque wrench to ensure the correct tightening of bolts. Using spring compressors is critical for safely removing and installing coil springs. Make sure to have all the necessary tools and replacement parts for a smooth installation.
3. How Much Does It Cost to Change Shock Absorbers and Coil Springs on a MERCEDES W124 in the UK?
The cost to replace shock absorbers and coil springs on a MERCEDES W124 in the UK can vary. On average, the cost of replacement parts (shock absorbers and coil springs) can range from £150 to £500, depending on whether you choose OEM or aftermarket components. Labour costs for professional installation typically range from £100 to £250, depending on the garage and complexity of the job.
4. Can I Change the Shock Absorbers and Coil Springs on My MERCEDES W124 Myself?
If you’re wondering, How to change shock absorber and coil springs on MB W124? and if it’s a DIY task, the answer depends on your mechanical skills. While it’s possible to change the shock absorbers and coil springs yourself, it requires a fair amount of expertise and proper tools. If you’re not experienced with suspension work, it’s recommended to consult a professional mechanic to ensure the job is done safely and correctly.
5. How Do I Know If the Shock Absorbers and Coil Springs Need Replacing on My MERCEDES W124?
Signs that the shock absorbers and coil springs on your MERCEDES W124 need replacing include a bouncy or rough ride, uneven tyre wear, or visible damage such as leaks on the shock absorbers. You may also notice excessive body roll or handling issues. If you experience any of these symptoms, it’s important to inspect or replace the shock absorbers and coil springs to maintain the vehicle’s safety and performance.
