What Causes the Failure of the Four-Door KG Handle in Mercedes-Benz?
3 Answers
It is caused by a malfunction in the core components of the Mercedes-Benz KG system, leading to the failure of the entire system. KG Function: The KG function allows entry into the vehicle and engine start without pressing any buttons on the key. Simply approach any door handle (all or selected ones open) and pull any door handle (all or selected ones open) to activate the external operation switch of the trunk lid (only unlocks the roof). KG Role: With the key on your person, you can open the locked doors and trunk without pressing any switches. After opening, there is no need to press any buttons; the doors you just opened will automatically lock. However, depending on the model, some vehicles may require pressing a button on the door handle first, while others only need a touch on the door handle.
A few days ago, the rear door handle of my Mercedes suddenly malfunctioned, and no matter how hard I pulled, the door wouldn't open. At first, I thought it was frozen, but later discovered that the internal linkage had broken. This type of mechanical failure is quite common in older models, especially in areas where the door is frequently opened and closed, leading to wear and tear. If you encounter a failure in the electronic keyless system, it might be due to a dead key battery or moisture affecting the handle sensor. I recommend starting with a manual inspection of the linkage to check for looseness or the need for lubrication, avoiding forceful pulling that could damage more components. When parking, try to avoid damp areas to reduce rust issues, and regularly visit a maintenance point to inspect mechanical parts to extend their lifespan. Safety first—if the door won't open, you can use the key or unlock it from the inside in an emergency to ensure you can escape if needed.
Most door handle failures are caused by wear and tear of internal mechanical components. I've seen many Mercedes door handles getting stuck. The linkage mechanism tends to loosen or break after prolonged use, especially in models with frequent door operations. For keyless entry systems with buttons, the issue might stem from depleted batteries or dirt accumulation in the sensor area - cleaning the contact points often solves it. I recommend first gently tapping the handle to check for jamming. If that doesn't work, disassemble it to inspect the linkage condition. In winter, handles can easily freeze - using warm air to thaw helps, but avoid pouring boiling water to prevent deformation. Regular lubrication of sliding tracks and joints is good practice, something I always include in my maintenance routine.
