How To Unstick A Parking Brake: A Step-By-Step Guide

How to Release MercedesBenz Electric Parking Brakes for Service
How to Release MercedesBenz Electric Parking Brakes for Service from


Having a stuck parking brake can be a frustrating experience, especially when you’re in a hurry. Whether you’re dealing with a frozen brake due to cold weather or a rusted mechanism, it’s important to know how to resolve the issue quickly and safely. In this article, we will provide you with a step-by-step guide on how to unstick a parking brake, so you can get back on the road in no time.

1. Assess the Situation

The first step is to assess the situation and determine the severity of the problem. Is the parking brake partially engaged or completely stuck? If it’s partially engaged, you may be able to release it by simply pulling the lever or pressing the release button. However, if it’s completely stuck, you’ll need to follow the next steps.

2. Find a Safe Location

Prioritize safety by finding a flat and secure location to work on your vehicle. Avoid parking on a slope or near traffic. If possible, use wheel chocks or blocks to prevent the vehicle from rolling.

3. Gather the Necessary Tools

You’ll need a few tools to unstick a parking brake. These include a lug wrench, a jack, and jack stands. Make sure you have these items readily available before you begin the process.

4. Loosen the Lug Nuts

To prevent the vehicle from rolling while you work on the parking brake, use the lug wrench to slightly loosen the lug nuts on the rear wheels. This will allow you to lift the wheels off the ground without any difficulty.

5. Lift the Vehicle

Using a jack, lift the rear of the vehicle until the wheels are off the ground. Place jack stands under the vehicle for added safety. Double-check that the car is stable and secure before proceeding.

6. Locate the Parking Brake Cable

The parking brake cable is typically located underneath the vehicle, near the rear wheels. It connects to the brake calipers or drums. Identify the cable and follow it to the point where it connects to the braking mechanism.

7. Apply Penetrating Oil

If the parking brake is stuck due to rust or corrosion, applying a penetrating oil can help loosen the mechanism. Spray the oil on the connection points of the cable and let it sit for a few minutes to allow the oil to penetrate.

8. Work the Parking Brake Lever

While the penetrating oil is doing its job, go inside the vehicle and repeatedly engage and disengage the parking brake lever. This can help break any rust or debris that may be causing the stickiness.

9. Examine the Cable and Mechanism

After working the parking brake lever, go back under the vehicle and visually inspect the cable and braking mechanism. Look for any signs of damage, fraying, or misalignment. If you notice any issues, it may be necessary to replace or adjust the cable.

10. Test the Parking Brake

Once you’ve completed the previous steps, lower the vehicle, tighten the lug nuts, and test the parking brake. Make sure it engages and disengages smoothly without any sticking or excessive resistance. If the problem persists, it’s recommended to have a professional mechanic inspect and repair the parking brake.


Learning how to unstick a parking brake is a valuable skill that can save you time and frustration. By following the step-by-step guide outlined in this article, you’ll be able to resolve the issue and ensure your parking brake functions properly. Remember to prioritize safety throughout the process and seek professional assistance if needed. Happy driving!