How to Open the Car Door When the Mercedes Key Runs Out of Battery?

[DelLogan]

When the Mercedes car key runs out of battery, you can use the mechanical key to open the door. Here is an introduction to the Mercedes car key: 1. Mercedes cars feature keyless entry, but if the car hasn't been driven for a long time, the battery may drain due to poor connection. If the battery is dead, the remote key entry won't work, and you might not even be able to open the door. In fact, there is a mechanical key hidden inside the remote key. 2. There are two types of keys with sensing functions in Mercedes car keys: one is the ordinary folding key, and the other is the hidden mechanical key. If you have a regular folding key, you can use the mechanical key to open the door when there's no power. If it's hidden, you'll need to locate the mechanical key. 3. The mechanical spare key is concealed within the main key. When needed, pull it out and use it like a regular mechanical key to open the door. However, the mechanical key usually only unlocks the driver's side door, and other doors need to be opened manually from inside the car.

[McLilliana]

Last time I encountered this situation in the parking lot, I broke out in a cold sweat from panic. The Mercedes key fob has a hidden mechanism on the side—just use your fingernail to pry open the latch and you can remove the metal key blade. There's a small indentation on the door handle cover; insert the key there to pry it open and reveal the lock cylinder. Here's the crucial part: After opening the door, the alarm will blare—don't panic! Press the key firmly against the sensor area on the right side of the steering wheel (usually marked with a key symbol), then press the start button while holding the brake. Old Wang from the company garage taught me this trick: Don't always keep the spare key at home, and it's safest to replace the battery before a business trip. This mechanical key unlocking method works for all Mercedes models—I've tried it on both my C-Class and GLE.

[London]

As a frequent construction site visitor and Mercedes owner, I'm quite familiar with this issue. First, locate the small square cover at the end of the door handle, then use your key tip to pry it open to reveal the mechanical keyhole. Remember to immediately place the key next to the start button after unlocking - the manual calls this the 'inductive restart position'. Last year when my key battery died in the wilderness, I used this method to start the car and drove straight to the dealership. Actually, smart keys will flash a red light to warn of low battery in advance. I always make it a habit to wipe the key gaps with a dry cloth when washing the car, as moisture accelerates battery drain. The Mercedes me APP on your phone can also remotely unlock the car, but you need to have the vehicle pre-registered.

[VanRowan]

Last month, this happened when picking up the kids. The Mercedes key can be disassembled: press the silver button on the side and pull out the mechanical key blade. Pry open the plastic cover on the front right door handle with the small key, turn it counterclockwise 90 degrees to open the door. The key point is not to be startled by the alarm after opening the door—immediately press the key against the steering column sensor area and press the ignition button to deactivate it. A 4S technician once said that if the remote fails, first place it against your chest to enhance the signal; if that doesn’t work, use the mechanical key. Models with keyless entry should pay special attention, as the alarm sound is louder than in regular cars.