1. Open the Trunk (Boot):
- Press the trunk release button on your key fob or in the vehicle.
- Lift the trunk lid and secure it in the open position.
2. Locate the Battery Compartment:
- On most Mercedes-Benz S-Class models, the battery is located in the trunk, usually on the left or right side.
- Look for a plastic cover or compartment labeled "Battery."
3. Remove the Trunk Trim (if necessary):
- Some models may have a plastic trim or cover that needs to be removed to access the battery.
- Use a trim removal tool or pry gently to remove any covers.
4. Open the Battery Compartment:
- Locate and press the release button or lever to open the battery compartment.
5. Disconnect the Negative Terminal (Black):
- First, disconnect the negative (black) terminal of the battery.
- Use a suitable wrench or socket to loosen the nut or bolt securing the negative terminal cable.
- Remove the cable and make sure it does not come into contact with the positive terminal or any metal parts.
6. Disconnect the Positive Terminal (Red):
- Next, disconnect the positive (red) terminal.
- Follow the same procedure as for the negative terminal.
7. Remove the Old Battery:
- Once both terminals are disconnected, carefully lift and remove the old battery from the compartment.
8. Clean the Battery Compartment (optional):
- You can take the opportunity to clean the battery compartment with a damp cloth to remove any dirt or corrosion.
9. Insert the New Battery:
- Carefully place the new battery into the compartment, ensuring the positive and negative terminals are correctly aligned.
10. Connect the Positive Terminal (Red):
- Reconnect the positive (red) terminal first.
- Secure the terminal cable using the nut or bolt and tighten it firmly.
11. Connect the Negative Terminal (Black):
- Finally, reconnect the negative (black) terminal.
- Ensure it is securely fastened.
12. Close the Battery Compartment:
- Close the battery compartment and make sure it is properly secured.
13. Replace the Trunk Trim (if removed):
- If you removed any trim or covers, reinstall them carefully.
14. Close the Trunk:
- Gently close the trunk lid and ensure it is properly latched.
Remember, some variations may exist depending on the specific model and year of your Mercedes-Benz S-Class. Always consult your owner's manual for vehicle-specific instructions and safety guidelines. If you are unsure or uncomfortable with any of these steps, it's best to seek professional assistance from a qualified mechanic.
