Thanks guys! I have to be honest and tell you I have no idea what this "bonnet de douche" expression means or references to, can you please enlight me? That's true I haven't posted any photo of my current "garage", here's one:
Did you not get "Only fools and horses" on TV in France? http://www.bbc.co.uk/comedy/onlyfools/lingo/euro.shtml
Nope sorry I didn't know that TV show, thanks for the info! Some of those expressions/translations in the link are hilarious, completely "2nd degree"