iPhone5 cradle. Can you use it with iPhone 5c?

2009 Audi A6 Avant GSM phone prep LOW

Hi, I have for the fitting point in my arm rest for a phone cradle. I have just brought an IPhone 5c and want to buy the cradle for it. Having spoken to an Audi dealer they say they don't know if the 5c is compatible with the iphone 5/5s cradle.

Apparently Audi say it is only compatible with the 5 and 5s but I can't understand what difference the 5c would make? Same charging point and same software on the phone surely...

Local Audi dealer think Audi may have just not tested the 5c so are unwilling to categorically say it works just encase it doesn't...

Hoping someone else has tried this phone cradle with their iPhone 5c and knows if it works or not? Audi have said they will refund me if it doesn't work but I would prefer to find out before paying any money...

Any help or advice appreciated.

Thanks!