BenzIsWin

Hello one and all. I just purchased a '09 R-350, that is bone stock. I was waiting to get the vehicle inspection and started exploring all the switches and buttons to see what does what when I noticed something. When I touched the screen of the stereo head unit, it was (seemingly) abnormally hot to the touch. Like, so hot that you couldn't keep a finger on the screen for more that 10 or 15 seconds. Has anyone else ever experienced anything like this? Is this normal? I'd like to keep it all stock if possible, but I'll definitely replace it with something aftermarket if necessary.

Thanks in advance for any information.
Terry.