How do you open Mercedes 180 when the keys have been locked in the boot?

To open a Mercedes 180 when the keys are locked in the boot, you can try using the emergency key that is often included in the key fob, which can be used to unlock the driver's door. If that doesn't work, you may need to contact a professional locksmith or your local dealership for assistance, as they have the tools and expertise to safely unlock the vehicle without causing damage. Additionally, some models might allow access through the rear seats if they can be folded down.