Opel Blaupunkt Car300 Code Generator - Mhh Auto - Page 1 Updated May 2026

Unlocking an Opel Blaupunkt CAR300 radio requires the 4-digit code found in the Car Pass, or the serial number (beginning with GM0300 or BP) found on the side of the unit. Once obtained, hold the [AS] button while turning the radio on, then use presets 1-4 to enter the code and confirm with [AS]. Find detailed instructions at Google Play RADIO CODE for OPEL CAR300 - Apps on Google Play

What you need to extract from your radio:

Turn the radio on. It will display SAFE or CODE.
Turn the radio OFF.
Hold the "AS" (Auto Store) and "ST" (Stereo) buttons simultaneously.
Turn the radio ON while holding those buttons.
The display will flash a 14-character string. Example: BP031261672518
Once you have retrieved the code, use the following sequence to unlock the radio: Turn the ignition Press and hold the while turning the radio Continue holding until the display shows "10 - - - -" and a beep is heard. preset buttons (1, 2, 3, 4) to enter the code digits: Press button repeatedly until the first digit appears. Repeat for buttons 2, 3, and 4 for the remaining digits. Press and hold the Opel Blaupunkt CAR300 code generator - MHH AUTO - Page 1

Part 7: The Ethics and Legality of Code Generators

This is the gray area MHH AUTO operates in. Unlocking an Opel Blaupunkt CAR300 radio requires the

Q: Can I use my phone to generate the code? A: Some users have ported the CAR300 algorithm to Android APKs. Search the MHH thread for "CAR300 Android APK." Otherwise, use a remote desktop app to connect to a PC. Turn the radio on

But why is this specific thread so famous? What exactly is a code generator? And most importantly, how do you use the information from MHH AUTO (Page 1) to unlock your radio without paying a dealership $100?
1. Turn the car ignition off. (Safety first).
2. Remove the radio. For the CAR300, you need two U-shaped DIN removal tools (or two small metal rods/flathead screwdrivers if you are careful). Insert them into the two holes on the left and right of the unit's faceplate.
3. Slide the unit out.
4. Look at the metal sticker on the side or top of the chassis.

Part 7: The Ethics and Legality of Code Generators

This is the gray area MHH AUTO operates in.

Q: Can I use my phone to generate the code? A: Some users have ported the CAR300 algorithm to Android APKs. Search the MHH thread for "CAR300 Android APK." Otherwise, use a remote desktop app to connect to a PC.

But why is this specific thread so famous? What exactly is a code generator? And most importantly, how do you use the information from MHH AUTO (Page 1) to unlock your radio without paying a dealership $100?

Turn the car ignition off. (Safety first).

Remove the radio. For the CAR300, you need two U-shaped DIN removal tools (or two small metal rods/flathead screwdrivers if you are careful). Insert them into the two holes on the left and right of the unit's faceplate.

Slide the unit out.

Look at the metal sticker on the side or top of the chassis.