I've recently been emailing them and calling them about referral codes, or even just a promo code.. But they keep telling me that they have nothing to offer at the current time.
I personally have had too many bad experiences with Car2Go. They have a really bad customer service. And even when their own system was at fault, resulting in extra charges, they refuse to refund me.
Car2Go is a bunch of Jerks
I will not work with a company that doesn't give a hoot about their customers.