How to reset the maintenance light on a Mercedes GLK300?

[VanReed]

Steps to reset the maintenance light on a Mercedes GLK300: 1. Power on the car, press the OK button on the left side of the steering wheel and the answer call button on the right side of the steering wheel; 2. Select AssystPlusWorkShop and press the OK button; 3. Choose the ServiceDone option and press the OK button to complete. The GLK is a mid-size SUV under the Mercedes-Benz brand, equipped with three types of engines: a low-power version of the 2.0L turbocharged engine, a high-power version of the 2.0L turbocharged engine, and a 3.0L naturally aspirated engine.

[DelCharles]

Last time when my GLK300's maintenance light came on, I reset it myself and it was super easy. First, completely turn off the car and sit in the driver's seat. Hold down the hooked OK button on the steering wheel with your left hand, then turn the key to the dashboard power-on position with your right hand—but don’t start the engine. At this point, a yellow wrench icon will pop up on the screen. Immediately release your left hand and quickly press the OK button again to confirm the reset. That’s it. Don’t step on the brake or start the car during the process, and make sure the actions are smooth. It took me three tries to succeed on my 2014 model—newer touchscreen models might have slightly different steps. If it doesn’t work, it’s best to check the owner’s manual to avoid wasting money at the dealership. Also, remember to check the oil dipstick and tire pressure while you’re at it.

[ElizabethAnn]

My neighbor Uncle Zhang, who has run an auto repair shop for twenty years, taught me a very practical method for resetting the GLK300 maintenance light: First, turn off the engine and remove the key, wait for two minutes, then reinsert the key but do not start the engine. Hold down the OK button on the steering wheel with your left hand, turn the key to the ON position with your right hand, and wait for the dashboard self-check to complete. When the maintenance prompt pops up, immediately release the button and press the OK button again to confirm. The old man specifically reminded me to turn the key all the way, as moving too slowly will cause the system to time out and fail. After resetting, he suggested checking the brake pads and windshield washer fluid, as these consumables are often overlooked, especially before long trips, to avoid breakdowns on the road.

[OMorgan]

My friend just bought a used GLK300 and encountered this issue. I taught him a three-step solution: After turning off the engine, hold the OK button → turn the key to power on → release the OK button when the dashboard prompts and then press to confirm. The whole process takes only 20 seconds! Key point: This must be done when the engine is cold, as the ECU system may respond slower when hot. The button position varies slightly by model year—the OK button is on the right side of the steering wheel for the 2010 model, but moved to the left for the 2014 model—but the method is generally the same. After resetting, it's recommended to note the current mileage for easier estimation of the next maintenance cycle, as delayed maintenance on German cars can easily trigger fault codes.