(what are you saying? english please)
nah, thats no fun. I was a boy scout and being prepared is something I do a lot. If the serpentine belt shreds at 2 am I have to sit there and wait for a AAA truck to show up and tow me to a shop where we will have to wait even longer and get a replacement belt at 8 am when everyone else opens up, probably have to get a hotel room as well, then hope and pray there is a belt for the car anywhere near by and hope there is a mercedes dealershop close in case I have to go there.

oh wait, this all could have been avoided if I had a spare belt, a quick change on the road(add flashlights to list) and gee, the time and money saved by a simple belt.

wow.... I'll just let you, un prepared, driver sit and think about that.