Quick answer: Many Mercedes-Benz models have a small second battery, the auxiliary battery, that backs up the main 12-volt battery. It keeps key systems powered while the engine restarts during ECO start/stop and supports electronic functions like shifting into Park. The “Auxiliary battery malfunction” message means that backup battery is weak or failing. In most…
Quick answer: Press the ECO start/stop button, usually marked with an “A” inside a circular arrow, on the center console or overhead panel. The indicator light goes out and the engine will stay running at stops. On some newer models with MBUX, the setting lives in the vehicle menu on the central display. The system…
Quick answer: Most current Mercedes-Benz smart keys use a CR2025 3-volt coin battery. To change it, slide the release catch on the key, pull out the mechanical emergency key, use its tip to open the battery cover, swap the battery with the plus side facing the way the old one did, and close the cover….
Quick answer: Mercedes-Benz warning lights follow a color code. Red means stop safely as soon as you can and do not keep driving. Yellow or amber means something needs attention soon, but the car is usually safe to drive to service. Green, blue or white is information only, telling you a feature is on. When a light comes on, your instrument cluster…
Updated October 2026 Quick answer: At Mercedes-Benz of Gilbert, Service A typically runs $150 to $250 and Service B typically runs $300 to $500, depending on the model. Most owners alternate one of each, about once a year or every 10,000 miles, so scheduled maintenance usually lands around $450 to $750 a year. Tires, brakes…
If you are towing a boat to Roosevelt Lake or a trailer up the 87, the number on the brochure is only half the story. Here is what every current Mercedes-Benz can pull, and what actually limits you once you hitch up. Mercedes-Benz towing capacity by model Model Maximum towing, properly equipped GLE 7,700 lbs…
Quick answer: Arizona monsoon season runs June 15 through September 30. If you drive into a dust storm, pull completely off the roadway, turn your engine and all lights off, and take your foot off the brake. Afterward, rinse the vehicle before touching the paint, and check the cabin air filter and driver assistance sensors….
If you own a Mercedes-Benz, you’ve seen the reminders — “Service A” or “Service B” — appear in your instrument cluster, and you may have wondered what the difference actually is. The two are the foundation of the Mercedes-Benz maintenance system, and understanding them helps you keep your vehicle running at its best. With Arizona’s…
When July hits triple digits in the East Valley, many families do the smart thing and head for cooler elevations, the pines of Flagstaff, the rim country, or out of state entirely. A Mercedes-Benz makes that drive a pleasure, but Arizona summer travel asks more of your vehicle than a normal trip. Heat, distance, and…
Tires are the only part of your Mercedes-Benz that actually touches the road, and in an Arizona summer, they take more abuse than almost any other component. Pavement temperatures across the Phoenix area can climb well past 160°F, and that sustained heat changes how your tires behave, wear, and fail. A little awareness now can…
