Why does the Mercedes-Benz have no response when starting with normal electricity?
2 Answers
Mercedes-Benz having no response when starting with normal electricity may be due to a fault in the anti-theft system or a problem with the fuse. Here are the specific reasons: Fault in the anti-theft system: Check if the vehicle's failure to start is caused by a fault in the anti-theft system. If it is, redo the anti-theft matching and check the corresponding wiring. Problem with the vehicle fuse: It is necessary to check the fuses in the vehicle's related fuse box and whether there is an issue with the body control module. In this case, it is best to use a computer to read the relevant fault codes to see if there are any faults.
I've been dealing with these Mercedes ignition issues for many years. When the power display is normal but there's no response when starting, it's most likely a problem with the starting system. Worn carbon brushes inside the starter motor can prevent the engine from turning, or oxidized contacts in the ignition switch may fail to send signals, often causing this fault. Another common issue is the anti-theft system intervening, such as weak key battery or a faulty signal receiver preventing the car from recognizing the key. Alternatively, the starter relay might be stuck—this component controls power to the starter motor, and if it fails, the entire circuit is interrupted. For Mercedes, automatic transmission cars won't start if the gear isn't in P or N. As a temporary measure, try gently tapping the starter motor housing or using a spare key, but it's best not to delay, as repeated attempts may damage components. Regular maintenance, such as cleaning battery terminals and checking anti-theft functions, can prevent most issues. It's recommended to visit a Mercedes specialist shop for a diagnostic scan to identify fault codes efficiently and safely.
