How to Replace Battery on Mercedes-Benz GLA-Class

DIY Cost: $110-$250
Est. Time: 30 min
Difficulty: Easy
This guide provides step-by-step instructions on how to replace the battery on the Mercedes-Benz GLA models such as GLA250. 

What you will need

This is what you will need to replace the battery on a Mercedes-Benz GLA-Class.


  • H7 AGM Battery 
    • Recommended Cold Cranking Amps (CCA) of at least 750A. 
    • AGM battery is recommended but not required. 



  1. Open the hood. If the battery is dead and the vehicle doesn't unlock, use the emergency key that is inside your keyfob to unlock the driver's door.unlock drivers doorPull the red hood release below the dashboard and go to the front of the car to open the hood. open  hood on glk to change battery Use the supporting rod to hold the hood up.Opened hood of the Mercedes Benz GLA Class.


  2. Find the battery and remove the cover. The battery is located at the driver's side on the engine compartment. On a Mercedes-Benz GLA the battery is between the brake fluid and the fuse box. Remove the cover by pulling away the hood release cable on the battery cover then pull out the cover.Location of the battery on the Mercedes Benz GLA-Class.


  3. Disconnect the positive and negative terminals of the battery. Use a 10mm wrench to loosen the bolt then pull the terminals out of the way. Disconnect the negative first, then the positive last. Removing the positive and negative terminals of the battery.


  4. Remove the battery bracket on the front side of the battery. Use a 13mm socket with an extension to remove the bolt that secures the bracket. The metal plat that is holding the battery.

    This is the metal plate or battery bracket that you will remove.

  5. Remove the battery from the vehicle. Use the handles of the battery to pull the battery out.Pulling out the battery using the handles on the battery.


  6. Install the new battery. Put the battery on the battery tray and slide it onto the metal plate that will lock the battery in. Make sure the battery is seated properly on the battery tray.Putting the battery back to its place.


  7. Reinstall the battery bracket or the metal plate that is holding the battery and put the 13mm nut back using a wrench or a socket.
  8. Clean the terminals first using a battery brush.
  9. Connect the positive and negative terminals. Connect positive first, negative last. Cleaning the terminals of the battery. 

    Cleaning the battery terminals using a battery brush.

  10. Connect the positive cable to the positive battery post and connect the negative cable to the negative battery post. Then tighten the 10mm nuts on the terminals and put the battery cover back in and lock it. Putting back the positive and negative terminal.


  11. Start the engine and allow it to idle. ABS and traction control lights may stay on at this point and that is normal. To reset the ABS and tracking control, turn the steering wheel all the way to the right and all the way to the left a couple of times and drive for five minutes.

To troubleshoot any warning lights that remain on, read the fault codes with a Mercedes-Benz scanner. 


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  • Make sure the battery terminals are on tight. If the battery terminals are loose the battery may not charge properly. 
  • If the battery light stays on even with a new battery installed, there is a high chance the alterator is defective. 
How to Replace Battery on Mercedes-Benz GLA-Class What you will need This is what you will need to replace the battery on a Mercedes-Benz GLA-Class.