A few nice car stickers images I found:
Magic 999 sticker (2007)
Image by radiothings.com
From the station formerly known as Red Rose Radio/Gold/999 this is a sticker for Magic 999 - covering Blackpool and Preston.
Image by DeeganMarie
CUPK Street Art Sticker
Image by urbanartcore.eu
Street art sticker on a traffiti-sign in Berlin by CUPK and some others.
More infos about urban art in Berlin: