Seeing the funny side

Waiting for my car to be serviced this afternoon, I noticed this sign on the window of the garage...

Four years warranty
Roadside cover
Servicing
Piece of mind

Eh? Did they mean...I'll give you a piece of my mind...or PEACE OF MIND?

Still, it gave me a good couple of hours to sit and read with no interruptions, while I was waiting. Bliss!