Hey guys! Got a 2020 Mercedes GLS 450 and need to reset that pesky oil light? You're in the right place. Maintaining your vehicle is super important, and knowing how to handle simple tasks like an oil reset can save you time and money. Let's dive into a comprehensive guide on how to reset the oil light on your 2020 Mercedes GLS 450. We'll cover everything from why it's important to how to do it yourself. So, buckle up, and let's get started!

Why Resetting Your Oil Light Matters

First off, why is resetting your oil light even important? Well, it's not just about getting rid of that annoying notification on your dashboard. Resetting the oil light after an oil change ensures that your vehicle's computer has an accurate record of your maintenance schedule. This is crucial for several reasons:

• Accurate Maintenance Tracking: Your car's computer uses this information to calculate when your next service is due. If you don't reset the light, it might prompt you for an oil change prematurely or, worse, not prompt you when you actually need one. This can lead to neglecting essential maintenance, which can cause significant damage to your engine over time.
• Preventing Engine Damage: Regular oil changes are vital for keeping your engine running smoothly. Fresh oil lubricates the engine's moving parts, reduces friction, and helps to dissipate heat. Old, dirty oil can't do these things effectively, leading to increased wear and tear. Ignoring the oil change light can result in serious engine problems, potentially costing you thousands of dollars in repairs.
• Maintaining Warranty: For those of you still under warranty, keeping up with scheduled maintenance is essential. Failing to reset the oil light and properly document your oil changes can potentially void your warranty if engine problems arise. Manufacturers often require proof of regular maintenance to honor warranty claims, so staying on top of this is a must.
• Resale Value: When it comes time to sell or trade in your GLS 450, having a well-documented maintenance history can significantly increase its value. Potential buyers will be more confident knowing that the vehicle has been properly cared for. Keeping records of your oil changes and other maintenance tasks can be a major selling point.

So, resetting your oil light isn't just a cosmetic thing; it's a critical part of maintaining your vehicle's health and value. Now that we understand why it's important, let's get into the how-to.

Step-by-Step Guide to Resetting the Oil Light on Your 2020 Mercedes GLS 450

Alright, let's get down to the nitty-gritty. Here's how you can reset the oil light on your 2020 Mercedes GLS 450. Follow these steps carefully to ensure you do it right.

Step 1: Prepare Your Vehicle

• Turn off the Engine: Make sure your car is turned off completely. You can't reset the oil light while the engine is running.
• Key in the Ignition (Position 1): Insert your key into the ignition and turn it to the first position. This is the position right before you start the engine. You should see the dashboard lights come on.

Step 2: Navigate to the Service Menu

• Use the Steering Wheel Controls: Use the left-side controls on your steering wheel to navigate through the menu options on your instrument cluster display. Look for the 'Trip' or 'Mileage' display.
• Press the 'Home' Button: Press the 'Home' button (usually a small house icon) to return to the main menu. From there, use the arrow keys to scroll down to the 'Service' menu.
• Select 'Service': Once you've found the 'Service' menu, press the 'OK' button to select it. This will take you to a submenu with various service options.

Step 3: Access the Oil Reset Function

• Scroll to 'Assyst Plus': In the 'Service' menu, you'll see options like 'Assyst Plus' or 'Full Service.' Scroll through these options using the arrow keys until you find 'Assyst Plus'.
• Select 'Assyst Plus': Press the 'OK' button to select 'Assyst Plus'. This will bring up more detailed service information.

Step 4: Confirm Oil Change

• Scroll to 'Confirm Service': Within the 'Assyst Plus' menu, look for an option like 'Confirm Service' or 'Service Carried Out'.
• Select 'Confirm Service': Press the 'OK' button to select this option. The system will then ask you to confirm that the oil change has been performed.
• Confirm Oil Grade (If prompted): Some models may ask you to confirm the oil grade used during the service. If prompted, select the correct oil grade from the options provided.

Step 5: Reset the Oil Light

• Select 'Yes': After confirming the service and oil grade (if applicable), the system will ask if you want to reset the oil light. Select 'Yes' to proceed.
• Wait for Confirmation: The system will take a few seconds to process the reset. You should see a confirmation message on the display, indicating that the oil light has been successfully reset.

Step 6: Verify the Reset

• Turn off the Ignition: Turn the ignition off completely.
• Start the Engine: Start the engine to verify that the oil light has been reset. The oil light should not appear on the dashboard.

Common Issues and Troubleshooting

Sometimes, things don't go as smoothly as planned. Here are some common issues you might encounter and how to troubleshoot them:

• Oil Light Doesn't Reset:
  • Incorrect Procedure: Make sure you're following the steps exactly as described above. Even a small deviation can prevent the reset from working.
  • Faulty Sensors: In rare cases, a faulty oil level sensor or oil pressure sensor can prevent the oil light from resetting. If you suspect a sensor issue, have your vehicle inspected by a qualified mechanic.
  • Software Glitches: Sometimes, the car's computer system might experience a glitch. Try turning off the car completely, waiting a few minutes, and then trying the reset procedure again.
• 'Service Required' Message Still Appears:
  • Other Maintenance Items: The 'Service Required' message might be related to other maintenance items, such as brake service or filter replacements. Check your vehicle's service schedule to see if any other maintenance is due.
  • Incorrect Reset: Double-check that you've correctly reset the oil light. Sometimes, the message persists if the reset wasn't completed properly.
• Difficulty Navigating the Menu:
  • Familiarize Yourself with Controls: Take some time to familiarize yourself with the steering wheel controls and the instrument cluster display. Refer to your owner's manual for detailed information on the menu system.
  • Try Again: Sometimes, the system can be a bit finicky. Try navigating the menu slowly and deliberately. If you get lost, start over from the beginning.

Tips for Maintaining Your 2020 Mercedes GLS 450

Keeping your 2020 Mercedes GLS 450 in top shape requires more than just resetting the oil light. Here are some additional tips to help you maintain your vehicle:

• Follow the Maintenance Schedule: Adhere to the maintenance schedule outlined in your owner's manual. This will help you keep track of important services like oil changes, filter replacements, and fluid checks.
• Use the Right Oil: Always use the correct type of oil recommended by Mercedes-Benz. Using the wrong oil can damage your engine and void your warranty.
• Check Fluid Levels Regularly: Regularly check your engine oil, coolant, brake fluid, and power steering fluid levels. Top up as needed to ensure optimal performance.
• Inspect Tires: Check your tire pressure and tread depth regularly. Properly inflated tires improve fuel economy and handling, while adequate tread depth ensures safe driving in all conditions.
• Keep it Clean: Regularly wash and wax your vehicle to protect the paint from the elements. Clean the interior to prevent the buildup of dirt and grime.

Conclusion

So there you have it! Resetting the oil light on your 2020 Mercedes GLS 450 is a straightforward process that you can easily do yourself. By following the steps outlined in this guide, you can ensure that your vehicle's computer has an accurate record of your maintenance schedule, helping you keep your engine running smoothly and maintain your warranty. Remember to always follow the manufacturer's recommendations for oil changes and other maintenance tasks.

Happy driving, and we'll catch you in the next guide! Don't forget to keep an eye on your ride and show it some love. Taking care of your car means it'll take care of you!