Where is the auxiliary battery of the GLC260 located?
4 Answers
The auxiliary battery of the Mercedes-Benz GLC260 is located on the right side of the trunk. Below are the specific details of the Mercedes-Benz GLC260: Powertrain Configuration: Equipped with a 2.0T engine, delivering a maximum power of 155kW and a peak torque of 350Nm, paired with a 9-speed automatic manual transmission. Exterior: The front features a polygonal grille with a starry sky-style mesh, presenting a visually fashionable and grand appearance. The latest matrix-style LED headlights on both sides are sharp, and the bottom-through ventilation design makes the front face appear wider. Interior: Includes a three-spoke steering wheel, a floating multimedia system tablet LCD screen, a curved integrated center console, and a transmission panel, combining luxury style with fashionable elements seamlessly. Additionally, it offers multiple radars and sensors, 360° panoramic imaging, brake pedestrian detection, blind spot monitoring systems, and other functional configurations to provide comprehensive protection for drivers and passengers.
Last time my GLC260's start-stop system triggered a warning, the 4S technician taught me how to locate the auxiliary battery. Lift the driver's side floor mat to reveal a cover with clips - it's hidden behind the plastic panel on the left side of the accelerator pedal. The black square box about palm-sized is what powers the start-stop system. Crucial reminder: when replacing it, place the key 3 meters away from the vehicle and disconnect the main battery terminals first. During my DIY attempt, I discovered you need to remove the side trim panel first - those cover clips are extremely tight, so a professional pry tool works best. The placement is quite stealthy, probably to prevent accidental contact while driving. If your start-stop malfunction light comes on, chances are this little battery has called it quits.
My bestie's GLC just had its auxiliary battery replaced. It's not in the trunk or engine bay—you have to crawl under the driver's seat to find it. Adjust the steering wheel to its highest position, look down and you'll spot a trapezoidal plastic cover on the left. Pry it open to reveal a small square box connected to red and black wires—that's the battery. The mechanic said this battery specifically powers the auto start-stop and electric steering systems, with an exceptionally small capacity. Last time her car wouldn't start, it was because this battery failed—the tow truck driver measured less than 8 volts with a multimeter. The newer models apparently relocated it behind the glove compartment on the passenger side.
Over the years working in auto repair, I've removed quite a few Mercedes auxiliary batteries. The GLC260's is hidden in the driver's footwell on the left side, requiring the removal of three interior panels to access it. Use a T20 screwdriver to remove the sill trim, then pry open the triangular cover with the Mercedes logo - the Varta battery secured by a silver bracket inside is what you're after. The space there is so tight that changing the battery always requires working in an awkward, twisted position. I've noticed Mercedes has changed the location in recent years - older models had it behind the glove box, while newer ones moved it to the left side. I'd advise owners against DIY replacement, as improper handling could trigger electronic system fault codes.
