How to Open Mercedes Benz Trunk Without Key

Lost your Mercedes key or locked it in the trunk? Don’t panic. Most Mercedes models have hidden manual release options, emergency pull levers, or smartphone app backups. This guide walks you through safe, legal methods to access your trunk—no damage, no stress.

Key Takeaways

• Check for a manual trunk release lever inside the cabin: Many Mercedes models include a hidden footwell or glovebox lever that manually opens the trunk.
• Use the emergency trunk release inside the trunk itself: A glow-in-the-dark pull tab or switch allows passengers or rescuers to open the trunk from the inside—critical for safety.
• Try the physical key blade in the key fob: Even if the electronic key fails, the fob often contains a hidden metal key that fits the trunk lock.
• Leverage Mercedes-Benz smartphone apps like Mercedes me connect: Remotely unlock your trunk via app if your vehicle supports it and is connected.
• Contact roadside assistance or a locksmith: Professional help ensures no damage and fast access, especially for newer keyless models.
• Avoid DIY drilling or prying: These can damage sensors, wiring, or the trunk mechanism—costly repairs often outweigh the convenience.
• Prevent future lockouts with spare keys or digital backups: Keep a spare fob in a secure location or use cloud-based access features.

Why You Might Need to Open Your Mercedes Trunk Without a Key

We’ve all been there—rushing out the door, juggling groceries, kids, and coffee, only to realize your Mercedes key fob is nowhere to be found. Or worse, you accidentally locked it inside the trunk while loading luggage. It’s a frustrating scenario, but not uncommon. Modern Mercedes-Benz vehicles are packed with advanced technology, including keyless entry, push-button start, and automated trunk releases. While these features add convenience, they also create new challenges when things go wrong.

The good news? Mercedes designs its vehicles with safety and user-friendliness in mind. Even without a working key, there are several legitimate, non-destructive ways to access your trunk. Whether you’ve lost your fob, the battery died, or the electronic system malfunctioned, knowing your options can save you time, money, and stress. This guide covers everything from built-in emergency releases to high-tech remote access, helping you regain control—quickly and safely.

Understanding your specific Mercedes model is key. Trunk access methods vary between sedans, SUVs, coupes, and convertibles, and newer models (post-2015) often have more digital integration than older ones. But regardless of your vehicle, Mercedes prioritizes safety and accessibility. That means even in a lockout, you’re rarely truly stuck. With the right knowledge, you can open your trunk without calling a tow truck or breaking anything.

Method 1: Use the Hidden Manual Trunk Release Lever

One of the most reliable ways to open your Mercedes trunk without a key is by using the manual release lever located inside the cabin. This feature is standard on many Mercedes models and is designed specifically for emergencies. It’s often overlooked because it’s discreetly placed, but once you know where to look, it’s a lifesaver.

Where to Find the Manual Release Lever

The location of the manual trunk release varies slightly depending on your Mercedes model and year, but it’s commonly found in one of three places:

– Driver’s side footwell: Look near the floor mat, just to the left of the driver’s seat. You may need to lift the carpet or remove a small panel to reveal a pull handle or cable.
– Glove compartment: Some models, especially older C-Class or E-Class sedans, hide the release behind the glovebox. Open the glovebox, then feel along the upper right or left side for a small lever or cord.
– Rear seat area: In SUVs like the GLE or GLS, the release might be behind the rear seats or in the cargo area sidewall.

For example, on a 2018 Mercedes C300, the manual release is tucked behind a small plastic cover in the driver’s footwell. Simply pop off the cover and pull the red or black handle. On a 2020 GLC, it’s located behind the glovebox—open it fully, reach up, and you’ll feel a loop or lever.

How to Operate the Manual Release

Once you’ve located the lever, the process is straightforward:

1. Ensure the vehicle is unlocked: The manual release typically only works if the car’s central locking system is disengaged. If the doors are locked, try unlocking them first using a spare key or the key fob (if it has a physical blade).
2. Pull the lever firmly: Most releases require a steady, upward or outward pull. Don’t yank—apply consistent pressure until you hear a click.
3. Open the trunk: After pulling the lever, the trunk should pop open slightly. Lift it manually to access the contents.

Tip: If the lever feels stiff or doesn’t respond, don’t force it. Check your owner’s manual—some models require the ignition to be in the “on” position or the parking brake to be engaged for the release to work.

Models That Include This Feature

Not every Mercedes has a manual interior release, but many do. Here are some common models where you can find it:

– C-Class (2015–2023)
– E-Class (2017–2023)
– S-Class (2014–2023)
– GLC, GLE, GLS (2016–2023)
– CLA and CLS (select years)

Always consult your owner’s manual for the exact location. If you can’t find it, search online using your VIN or model code—Mercedes forums and YouTube tutorials are great resources.

Method 2: Use the Emergency Trunk Release Inside the Trunk

If someone is trapped inside your trunk—or if you’ve accidentally locked yourself out with the key inside—the emergency trunk release is your best friend. This feature is required by law in many countries (including the U.S. since 2002) for safety reasons. It ensures that even if the trunk is closed from the outside, a person inside can escape.

How the Emergency Release Works

The emergency release is typically a glow-in-the-dark pull tab, lever, or push-button located on the interior trunk lid. It’s designed to be visible in the dark and easy to operate, even in panic situations. When activated, it mechanically disengages the trunk latch, allowing the lid to open from the inside.

Locating the Emergency Release

Look for a small, brightly colored (often yellow or green) handle or switch near the center of the trunk lid. On most Mercedes models, it’s positioned where your hand would naturally reach when lying down. For example:

– On a 2019 Mercedes E300, it’s a yellow pull strap mounted just above the license plate area.
– On a 2021 GLE 450, it’s a recessed push-button with a glow-in-the-dark ring.

If you can’t see it, shine a flashlight into the trunk. The glow-in-the-dark feature should make it stand out in low light.

How to Use It

1. Reach for the release: If you’re inside the trunk, feel along the upper edge of the lid.
2. Pull or press the mechanism: Depending on the model, you’ll either pull a strap or press a button.
3. Lift the trunk open: Once the latch releases, push the lid upward.

Important: This method only works from inside the trunk. If you’re outside and the key is locked inside, you’ll need another approach—like the manual interior release or a spare key.

Safety Tip

Never leave children or pets in the trunk, even for a short time. The emergency release is a safety feature, not an invitation to use the trunk as storage for living beings. Always supervise and secure cargo properly.

Method 3: Use the Physical Key Blade in Your Key Fob

Even in the age of keyless entry, Mercedes still includes a physical key blade inside the key fob. This is your backup when the electronic system fails—whether due to a dead battery, signal interference, or a malfunction.

How to Access the Hidden Key Blade

Most Mercedes key fobs have a small release button or slider on the side. Here’s how to find and use it:

1. Look for a small button or groove: On the side of the fob, press the button or slide the cover.
2. Pull out the metal key: A small, flat key blade will slide out. It’s usually stamped with the Mercedes logo.
3. Use it to unlock the trunk: Insert the key into the trunk’s physical lock cylinder (if equipped) and turn it.

Note: Not all Mercedes models have a physical lock cylinder on the trunk. Newer vehicles (especially those with hands-free power trunks) may only have electronic locks. In such cases, the key blade is primarily for the driver’s door.

Models with Trunk Key Cylinders

Older and mid-range models often retain a physical trunk lock. Examples include:

– C-Class (pre-2020)
– E-Class (pre-2018)
– CLA (2014–2019)
– GLC (pre-2020)

On these models, look for a small keyhole near the trunk handle or license plate. Insert the key blade and turn clockwise to unlock.

What If There’s No Trunk Keyhole?

If your Mercedes doesn’t have a physical trunk lock, the key blade won’t help directly. However, you can still use it to unlock the driver’s door, then access the manual interior release (Method 1). This two-step process is often the fastest workaround.

Pro Tip: Keep the Key Blade Accessible

Store your key fob in a place where you can easily remove the blade if needed. Some owners keep a spare key blade in their wallet or with a trusted family member. Just remember—this key only works on mechanical locks, not electronic systems.

Method 4: Use Mercedes me Connect or Smartphone App

For newer Mercedes models (typically 2016 and later), the Mercedes me connect app offers a high-tech solution to trunk lockouts. If your vehicle is equipped with connected services and you’ve set up the app, you can remotely unlock your trunk—no key required.

How Mercedes me Connect Works

Mercedes me connect uses cellular and GPS technology to link your car to your smartphone. With the app, you can:

– Lock and unlock doors
– Start the engine (remote start)
– Open the trunk (on supported models)
– Check vehicle status (fuel, mileage, location)

To use trunk unlocking, your vehicle must be enrolled in the Mercedes me connect service, and the feature must be activated in the app.

Steps to Unlock the Trunk Remotely

1. Open the Mercedes me connect app: Log in with your credentials.
2. Select your vehicle: Tap on the car icon.
3. Tap “Unlock Trunk”: This option appears if your model supports it.
4. Confirm the action: You may need to enter a PIN or use biometric authentication.
5. Wait for confirmation: The app will notify you when the trunk is unlocked.

Note: There may be a slight delay (10–30 seconds) as the signal travels from the app to the car.

Models That Support Remote Trunk Unlock

Not all Mercedes models allow remote trunk opening. It’s more common on luxury trims and newer vehicles. Check your owner’s manual or the app to confirm. Supported models often include:

– S-Class (2018+)
– E-Class (2020+)
– GLE, GLS (2019+)
– AMG GT (2020+)

Limitations and Considerations

– Requires cellular signal: If you’re in a remote area with no service, the app won’t work.
– Subscription needed: Mercedes me connect may require a paid subscription after the trial period.
– Security risk: Ensure your app is protected with a strong password and two-factor authentication.

Alternative: Use a Family Member’s Phone

If you don’t have your phone, but someone else does, they can log into your Mercedes me account (with permission) and unlock the trunk for you. This is especially useful during travel or emergencies.

Method 5: Call Roadside Assistance or a Professional Locksmith

When all else fails, professional help is the safest and most reliable option. Mercedes-Benz offers 24/7 roadside assistance to owners, and certified locksmiths specialize in luxury vehicles.

Mercedes Roadside Assistance

If you’re a Mercedes owner, you likely have access to complimentary roadside assistance for the first few years. This service can:

– Unlock your vehicle (including the trunk)
– Jump-start a dead battery
– Provide emergency fuel or towing

To use it:

1. Call the Mercedes-Benz roadside assistance number (found in your owner’s manual or on the Mercedes website).
2. Provide your VIN and location.
3. A technician will arrive to unlock your trunk using specialized tools.

This service is non-invasive and won’t damage your vehicle. It’s ideal for keyless models or when you’re in a hurry.

Hiring a Professional Locksmith

If you’re not covered by roadside assistance, a certified automotive locksmith can help. Look for one with experience in European luxury vehicles. They use tools like:

– Slim jims (for older models)
– OBD2 programmers (to reset electronic locks)
– Trunk pop tools (to trigger the latch remotely)

Avoid unlicensed locksmiths—they may cause damage or charge excessive fees.

Cost and Timeframe

– Roadside assistance: Usually free for new owners; otherwise $100–$200 per call.
– Locksmith: $75–$150, depending on location and urgency.

Most locksmiths can arrive within 30–60 minutes in urban areas.

Prevention Tip

Keep your roadside assistance number saved in your phone and written in your glovebox. Also, consider joining a service like AAA for additional coverage.

What NOT to Do: Avoiding Damage and Scams

In a panic, it’s tempting to try quick fixes—but some methods can cause serious damage or void your warranty.

Avoid Drilling or Prying the Trunk

Drilling into the trunk lock or prying the lid with a crowbar can:

– Damage the paint and body
– Break sensors or wiring
– Trigger airbag or alarm systems
– Cost thousands in repairs

Even if you succeed, the repair bill will far exceed the cost of professional help.

Don’t Use Coat Hangers or DIY Tools

While coat hangers work on older cars, modern Mercedes trunks have reinforced latches and electronic sensors. Forcing a wire through the seal can break the weather stripping or damage the lock mechanism.

Beware of Online “Hacks”

YouTube and forums are full of questionable advice—like using a vacuum cup to “suck” the trunk open. These methods are unreliable and often dangerous. Stick to manufacturer-approved solutions.

Never Leave Valuables in the Trunk Overnight

If you frequently lock yourself out, consider using a trunk organizer with a lock or keeping valuables in the cabin. Prevention is always better than a rescue.

How to Prevent Future Trunk Lockouts

The best way to handle a lockout is to avoid it altogether. Here are some smart habits to adopt:

Keep a Spare Key Fob

Store a spare key fob in a secure location—like a home safe, with a trusted friend, or in a magnetic key box under the car (only if discreet and weatherproof). Avoid hiding it in obvious places like the wheel well.

Use a Key Fob Battery Alert

Most Mercedes feps alert you when the battery is low. Replace it promptly—don’t wait until it dies. A new CR2032 battery costs under $5 and takes two minutes to install.

Enable Mercedes me connect

If your car supports it, activate the app and set up remote access. It’s a digital backup that can save you in a pinch.

Teach Family Members the Manual Release

Make sure everyone who drives your car knows where the manual trunk release is. Practice it once so they’re not fumbling in an emergency.

Regular Maintenance Checks

Have your trunk latch and locking mechanism inspected during routine service. Worn parts can fail unexpectedly.

Conclusion

Getting locked out of your Mercedes trunk is inconvenient, but it doesn’t have to be a disaster. With the right knowledge, you can open your trunk safely and legally—without damaging your vehicle or spending a fortune. From hidden manual levers to smartphone apps, Mercedes provides multiple layers of access for your peace of mind.

Start by checking the interior manual release, then try the emergency trunk release or physical key blade. If those don’t work, leverage Mercedes me connect or call professional help. And remember: prevention is key. Keep a spare fob, maintain your key battery, and stay familiar with your car’s features.

You drive a Mercedes because it’s smart, sophisticated, and reliable. Treat it with the same care when things go wrong. With these tips, you’ll never be truly locked out again.

Frequently Asked Questions

Can I open my Mercedes trunk if the key fob battery is dead?

Yes, most Mercedes key fobs have a hidden physical key blade that can unlock the driver’s door. Once inside, use the manual trunk release lever to open the trunk. Some models also allow trunk access via the Mercedes me connect app.

Is there a way to open the trunk if I locked the key inside?

If the key is locked in the trunk, try using the manual interior release lever or the emergency trunk release from inside (if someone can access it). Otherwise, use the Mercedes me app or call roadside assistance to avoid damage.

Do all Mercedes models have a manual trunk release?

Most Mercedes sedans and SUVs from 2015 onward include a manual release, but location varies. Check your owner’s manual or look in the driver’s footwell, glovebox, or rear seat area. Not all coupes or convertibles have this feature.

Can I use a smartphone to open my Mercedes trunk?

Yes, if your vehicle supports Mercedes me connect and remote trunk unlock. Open the app, select your car, and tap “Unlock Trunk.” This feature is available on newer models like the S-Class, GLE, and E-Class (2020+).

Will calling a locksmith damage my Mercedes?

A certified automotive locksmith with experience in European cars can unlock your trunk without damage. Avoid unlicensed technicians who may use improper tools. Mercedes roadside assistance is the safest option.

How do I find the emergency trunk release?

Look for a glow-in-the-dark pull tab or button inside the trunk lid, usually near the license plate area. It’s required by law on vehicles sold in the U.S. since 2002 and is designed for safety in case someone is trapped.