How to Jump Start a Mercedes-Benz GLA-Class - Dead Battery

In this guide, you will learn how to jump-start a Mercedes-Benz GLA-Class that has a dead battery.

DIY Cost: $0
Est. Time: 15 min
Difficulty: Easy

 

What you will need

Procedure

  1. Remove the metal blade/key from your Mercedes-Benz key fob. There is a release button in the key fob that will pop out the metal key. Use the metal key to unlock the driver's door.jump start gla with dead battery

     

  2. Open the hood by pulling the hood release lever under the dashboard. hood release gla

     

  3. Press the yellow release under the hood towards the passenger side and raise the hood. how to jump start mercedes benz gla

     

  4. Locate the terminals in the engine bay designed to jump-start your Mercedes-Benz. Pull/open the RED plastic cover with the + symbol to locate the positive port. The terminals are on the driver's side. gla jump start terminal

     

  5. Connect the red (positive) jumper cable to the positive terminal. positive terminal on gla
  6. Connect the black (negative) jumper cable to the ground terminal on the vehicle frame.Negative terminal GLA

     

  7. Make sure that the red cable (positive) is connected to the positive terminal and the black cable (negative) is connected to the negative terminal if another vehicle is used to jump start the vehicle.
  8. Get inside the car and start the engine. If the car did not start away let the battery charge for at least 10-15 mins and then start it again.jump start gla

     

  9. Once the engine starts, drive or let it idle for at least 20 minutes to charge the battery. If the battery is completely discharged or has a bad cell, the battery may not have enough power to restart the engine. 

  10. When you start the engine the ABS and other lights may be on. As long as there are no other issues, these reset automatically after driving for a few minutes. If the ABS, airbag or traction control light doesn't reset, follow this guide to learn how to read Mercedes-Benz fault codes. 

Where is the negative terminal on a Mercedes GLA? 

jump start temrinal

The negative terminal is on the driver side near the strut tower. 

Car Won't Jump Start

If all you hear is a click, check the jump starter clamps are making good contact. Ensure the jump box is fully charged.

The battery in the car may be completely discharged or bad. Keep the jumper cables connected for at least 15 minutes, then try again. 

Notes

  • Charge the battery fully then test it with a battery tester. For more help follow this guide. Check the battery date sticker on the top or side of battery. Most car batteries last between three to five years.
  • During charging and jump-starting, explosive gases can escape from the battery. There is a risk of an explosion. Particularly avoid fire, open flames, creating sparks, and smoking. Ensure there is sufficient ventilation while charging and jump-starting. Do not lean over a battery.
  • Make sure that the positive terminal of a connected battery does not come into contact with vehicle parts. Never place metal objects or tools on a battery. It is important that you observe the described order of the battery terminals when connecting and disconnecting a battery. 
  • When jump-starting, make sure that the battery poles with identical polarity are connected. It is particularly important to observe the described order when connecting and disconnecting the jumper cables. Never connect or disconnect the battery terminals while the engine is running
  • Make sure the jumper cables are not damaged or wires are exposed. 
  • The jumper cables should not contact the parts that can move when the engine is running, such as the V-belt pulley or the fan.

Frequently Asked Questions

How to get into the trunk, if you have a dead battery

  • Use the emergency key blade found inside your key fob to manually unlock the trunk. 

How to charge a dead battery

  • By trickle charging a dead battery, you have a better chance of bringing the battery back to life. Otherwise, your battery may no longer hold a proper charge. 
  • Use the OEM 12 Volt Battery Charger or even the cheaper Black+Decker BBM3B 12V Battery Charger Maintainer, which works just as well.
  • It will take at least 24 hours to bring a completely dead battery back to life. You are only providing 2 Amperes to the battery, which is a slow charge but ensures no damage is caused to the battery cells. 

My car battery keeps dying

  • If your battery keeps on dying or is not holding a proper charge, it could be due to any of the following:  
    • Battery age / old battery
    • Corroded or loose battery connections
    • Parasitic current drains in the electrical system.
How to Jump Start a Mercedes-Benz GLA-Class - Dead Battery