Now Waeco has reacted to the many complaints with the heated seat pad and an entirely different plug for Zigarrettenanzünderbuchse constructed or installed. He holds now among Japanese passenger vehicles, as it can be locked after connecting with a button. However, this construction does not seem to me to be fully worked out to 100%, because the locking button 4 times after pressing no longer read unlock. I therefore returned the part and leave me that this is not a design flaw that occurs at each plug, which is why I will send me the part (Heated seat cover) again. Hope dies last!