Now I understand that having maintenance done on your vehicle can be an inconvenience and even frustrating at times, but I think this is certainly taking things too far.

My favorite part (@1:53) is when someone comes to tap on the window of the car ramming through the showroom.  "Um, excuse me.  Sir?  Sir!  You're in the showroom."  I also like how it's all set to 'Highway to Hell'.

From what we know about this video, it went down something like this.  Customer brings his Suzuki SUV back to the dealership to have a faulty shock replaced.  Dealership refuses.  Customer becomes incensed and takes it out on the showroom, destroying his own car and several others in the process.