For many models made after 2001, you can display the serial by holding buttons 1 and 6 simultaneously while turning the radio on.
You can also contact Alpine Customer Support directly with proof of purchase to retrieve your code. Mercedes-Benz Radio Code ··· Unlock Code in Minutes alpine radio code generator
There are several ways to access these generators, ranging from free mobile apps to premium professional services: For many models made after 2001, you can
You enter the specific alphanumeric serial number into the generator. For many models made after 2001
Most Alpine security systems use a 4- or 5-digit PIN that is mathematically linked to the unit's internal serial number.