Mercedes-Benz Mercedes GLA 2020-present Electrical Specifications

The 2020-Present Mercedes GLA features a 12-volt electrical system with a lithium-ion starter battery. It supports advanced driver-assistance systems (ADAS) including adaptive cruise control, lane-keeping assist, and automatic emergency braking. The vehicle is compatible with Mercedes-Benz’s MBUX infotainment system, which includes dual 10.25-inch displays, voice control, and smartphone integration via Apple CarPlay and Android Auto. The electrical system is designed to handle up to 150 amps, ensuring reliable performance for all integrated technologies.

Regular maintenance of the electrical system includes checking the battery health every 12 months or 10,000 miles, whichever comes first. Inspect wiring harnesses for wear or damage annually. Ensure software updates for the MBUX system and ADAS are performed during routine service visits. Replace the cabin air filter every 20,000 miles to prevent strain on the climate control system. Always use Mercedes-Benz-approved parts and follow the manufacturer’s maintenance schedule to avoid voiding the warranty.

To replace the battery, first, ensure the vehicle is turned off and the key is removed. Locate the battery under the hood, typically on the driver’s side. Disconnect the negative terminal first, followed by the positive terminal. Remove the battery hold-down clamp and carefully lift out the old battery. Install the new battery, ensuring it’s securely placed. Reconnect the positive terminal first, then the negative terminal. Finally, reset the battery monitoring system using a compatible diagnostic tool or by following the vehicle’s manual instructions.

If the MBUX infotainment system malfunctions, first restart the system by holding the power button for 10 seconds. If the issue persists, check for software updates via the Mercedes Me app or at a dealership. Ensure all cables for smartphone integration are securely connected. If the problem continues, inspect the fuse box for any blown fuses related to the infotainment system. If none of these steps resolve the issue, consult a certified Mercedes-Benz technician for further diagnostics.

To optimize electrical performance, regularly update the MBUX system and ADAS software. Use high-quality, Mercedes-Benz-approved components for replacements. Avoid overloading the electrical system by minimizing the use of aftermarket accessories. Ensure the battery is fully charged and in good condition. Drive the vehicle regularly to maintain battery health. Additionally, keep the alternator and wiring harnesses clean and free from corrosion to ensure efficient power distribution.