w205 aux battery

Introduction

This tutorial provides a step-by-step guide on locating and accessing the auxiliary battery in a Mercedes-Benz C-Class (model W205, 2015). Understanding the location of the auxiliary battery is crucial for maintenance, troubleshooting electrical issues, or during a battery replacement.

Step 1: Prepare Your Tools and Workspace

Before you begin, gather the following tools and materials:

• Screwdriver (flathead and Phillips)
• Ratchet and socket set
• Safety gloves
• Flashlight (for better visibility)

Ensure you have a clean workspace to avoid losing any small parts during the process.

Step 2: Access the Auxiliary Battery Compartment

1. Open the trunk of your Mercedes-Benz C-Class.
2. Remove the trunk floor mat to expose the storage area.
3. Locate the rear trunk side panel on the passenger side. This is where the auxiliary battery is typically housed.
4. Unscrew the side panel using a screwdriver or ratchet. Be careful to keep the screws in a safe place.

Step 3: Remove the Auxiliary Battery Cover

1. Lift the side panel to reveal the battery compartment.
2. Look for the battery cover, which may be secured with additional clips or screws.
3. Detach the battery cover carefully; this may require a little force if it’s been in place for a while.

Step 4: Inspect the Auxiliary Battery

1. Examine the battery for any signs of corrosion or damage.
2. Check the battery terminals to ensure they are tight and free of corrosion.
3. If you need to replace the battery, make sure to note the battery specifications (size, type, and voltage).

Step 5: Replace or Disconnect the Auxiliary Battery

1. To disconnect the battery, start by removing the negative terminal first (usually marked with a minus sign).
2. Follow with the positive terminal (marked with a plus sign).
3. If replacing, install the new battery by connecting the positive terminal first, followed by the negative terminal.
4. Ensure both terminals are tight and secure.

Step 6: Reassemble the Battery Compartment

1. Replace the battery cover, ensuring it fits snugly.
2. Reattach the side panel and secure it with screws.
3. Reinstall the trunk floor mat to complete the process.

Conclusion

You have successfully located and accessed the auxiliary battery in your Mercedes-Benz C-Class. Regularly checking the auxiliary battery can prevent potential electrical issues and extend the life of your vehicle's electrical system. If you encounter any issues during this process or need further assistance, consider consulting a professional mechanic.