Frequently Asked Question: Mercedes-Benz

How Do I Activate the ECO® Start/Stop System in Mercedes-Benz Vehicles and How Does it Work? 

How Does the Mercedes-Benz ECO Start/Stop System Work? 

If you're shopping for a luxury vehicle that helps reduce fuel consumption and emissions, Mercedes-Benz has several technologies designed with efficiency in mind. One of the most helpful is the Mercedes-Benz ECO Start/Stop system, which automatically turns the engine off during certain stops and restarts it when you're ready to drive. When you're commuting through Peoria, driving around Phoenix, or sitting at stoplights on your daily route, this feature helps reduce unnecessary idling while maintaining the smooth driving experience Mercedes-Benz is known for. At Mercedes-Benz of Arrowhead in Peoria, AZ, we're happy to demonstrate how the ECO Start/Stop system works during your test drive. 

What Is the Mercedes-Benz ECO Start/Stop System? 

The Mercedes-Benz ECO Start/Stop system improves fuel efficiency by automatically switching off the engine when your vehicle comes to a complete stop under the right conditions. As soon as you're ready to move again, the engine restarts almost instantly. 

Because idling consumes fuel without moving the vehicle, this technology can help reduce fuel usage and lower tailpipe emissions during everyday driving. It's especially beneficial for drivers who spend a lot of time in city traffic or at long traffic lights. 

Many modern Mercedes-Benz vehicles equipped with gasoline, diesel, and select hybrid powertrains include this feature. 

How Does the ECO Start/Stop System Work? 

Using the system is simple because it's enabled automatically whenever you start your Mercedes-Benz. 

Here's what typically happens: 

1. Come to a Complete Stop 

When you stop your vehicle and keep your foot firmly on the brake pedal, the system evaluates whether operating conditions are appropriate. 

2. The Engine Temporarily Turns Off 

If all operating requirements are met, the engine shuts off while electrical systems such as the infotainment display, lighting, and many vehicle functions continue operating normally. 

3. Release the Brake 

As you prepare to move by releasing the brake pedal, the engine restarts almost immediately. 

4. Continue Driving Normally 

The transition feels smooth, so you can accelerate without unnecessary delay. 

When Doesn't the ECO Start/Stop System Activate? 

The system is engineered to prioritize comfort, performance, and reliability. It may keep the engine running when additional power or climate control is needed. 

Common situations include: 

• The engine has not reached normal operating temperature. 
• The battery needs additional charging. 
• Cabin heating or air conditioning requires the engine to maintain interior comfort. 
• The outside temperature is extremely hot or cold.
• The steering wheel is turned significantly while maneuvering. 
• The vehicle is stopped on certain steep grades. 
• The driver's seat belt is unfastened, or a door or hood is open. 
• Other vehicle operating conditions require the engine to remain on. 

If these conditions are present, the system simply waits until they change before activating again.

How Do I Know if ECO Start/Stop Is Active? 

Most Mercedes-Benz models display an ECO indicator within the instrument cluster. 

Depending on your model, you may also see messages showing whether the system is ready, currently active, or temporarily unavailable. If the engine stays running during a stop, the vehicle is typically indicating that one of the operating conditions hasn't been met. 

If you have questions about how your specific Mercedes-Benz model operates, our team at Mercedes-Benz of Arrowhead can walk you through the system.

Which Mercedes-Benz Models Have ECO Start/Stop? 

Many current Mercedes-Benz vehicles include ECO Start/Stop technology, including popular models such as: 

• Mercedes-Benz C-Class 
• Mercedes-Benz CLA Coupe 
• Mercedes-Benz CLE Coupe and Cabriolet 
• Mercedes-Benz E-Class 
• Mercedes-Benz S-Class 
• Mercedes-Benz GLA SUV 
• Mercedes-Benz GLB SUV 
• Mercedes-Benz GLC SUV and Coupe 
• Mercedes-Benz GLE SUV and Coupe 
• Mercedes-Benz GLS SUV 

Equipment and availability may vary depending on the model year, trim level, and powertrain. 

How Do I Turn Off the Mercedes-Benz ECO Start/Stop System? 

Some drivers prefer to deactivate the feature for a particular trip. 

To temporarily switch it off: 

Locate the Auto Start/Stop button featuring an "A" surrounded by a circular arrow. 

Press the button after starting your vehicle. 

A dashboard indicator confirms the system has been deactivated. 

The setting is temporary. On most Mercedes-Benz models, the system returns to its default setting the next time you start the vehicle. 

Benefits of the Mercedes-Benz ECO Start/Stop System 

Drivers looking for a more fuel-efficient luxury vehicle often appreciate the advantages of this technology. 

Some of the biggest benefits include: 

• Helps reduce fuel consumption during idle time. 
• Lowers emissions in stop-and-go traffic. 
• Operates automatically with no additional effort. 

For drivers searching for fuel-efficient luxury SUVs or eco-friendly luxury cars near Phoenix, this technology is one of many features that make today's Mercedes-Benz lineup both sophisticated and environmentally conscious. 

Frequently Asked Questions About Mercedes-Benz ECO Start/Stop 

Does ECO Start/Stop save gas? 

Yes. By reducing the amount of time the engine idles while the vehicle is stopped, the system can help lower fuel consumption, particularly during city driving with frequent stops. 

Can I permanently disable the ECO Start/Stop system? 

On most Mercedes-Benz models, the system resets to its default operating mode each time the vehicle is restarted. You can temporarily deactivate it using the Auto Start/Stop button during an individual drive. 

Is it normal for the engine not to shut off every time I stop? 

Yes. The system continuously checks battery charge, engine temperature, climate control demands, outside temperature, and other operating conditions before deciding whether to activate. 

Does ECO Start/Stop wear out the starter? 

Mercedes-Benz engineers this system with reinforced starting components that are designed for frequent restarting. The vehicle's starting system is built to accommodate normal ECO Start/Stop operation. 

Does the air conditioning keep working when the engine turns off? 

Usually, yes. However, if the climate control system needs additional cooling or heating to maintain cabin comfort, the engine may restart automatically or remain running. 

Experience Mercedes-Benz Efficiency at Mercedes-Benz of Arrowhead 

If you're searching for a fuel-efficient luxury SUV or luxury sedan near Phoenix, visit Mercedes-Benz of Arrowhead in Peoria, AZ. Our team can demonstrate how the Mercedes-Benz ECO Start/Stop system works, explain the efficiency features available across the lineup, and help you compare the latest Mercedes-Benz models to find the right fit for your lifestyle. 

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