Format the SD card to FAT32 (or exFAT if the files are larger than 4GB). Copy the firmware files (usually including a metainfo2.txt file and several folders) directly to the root of the SD card. Do not put them in a subfolder.
The system will scan the files. Select the firmware version displayed (MH2P_ER_AUG35_P2873).
Turn on the ignition and let the MMI fully initialize. Access the "Red Engineering Menu" (REM). On most Audi models, this is done by holding two specific buttons simultaneously (e.g., NAV/MAP + MEDIA or Back + upper left function button ) for 5–10 seconds. Start the Update: Insert the SD card into Slot 1. In the Engineering Menu, select Update . Select the source (SD1). mh2peraug35p2873 install
The system will reboot several times and show progress bars for various modules (Tuners, Bluetooth, Navigation, etc.). This process can take 30 to 60 minutes. Do not touch any controls or turn off the ignition until you see a "Summary" screen.
If your vehicle has a premium sound system (Bose or B&O), firmware updates can sometimes overwrite the sound parameters, resulting in no audio or poor sound quality. Experts often recommend in a "User-Defined" update or using an optical bridge to bypass the amp during the process. Format the SD card to FAT32 (or exFAT
After the update, you may see a "Return to Main Menu" option. You might notice a "Software Version Management" (SVM) fault code if you scan the car with a tool like VCP (Vag Can Professional) or OBDeleven . This is normal and can be cleared using an SVM calculator or specialized diagnostic software. Critical Warning for Bose/Bang & Olufsen Systems
Use a 16GB or 32GB Class 10 SD card. Avoid using micro-SD cards with adapters as they can be unstable during data transfer. The system will scan the files
It is critical to connect your vehicle to a battery charger (stable power supply) during the update. If the car loses power during the flash, the MMI unit can be permanently damaged ("bricked").
Choose or User-Defined (Standard is recommended for most users).