How to Program All Keys Lost – VAG Micronas with Autel IM608

Vehicle example: 2014 Audi TT with a blade key and Micronas cluster.
Scenario: All keys have been lost.
Tool: Autel IM608

Question:
How can you program new keys using the Autel IM608 in an “All Keys Lost” situation on a Micronas system? Is it possible to enter service mode on the bench using Autel?
 

Method 1: Service Mode via EEPROM or Cable
 
Option A: Use an SVG cable and pogo pin adapter to enter service mode.
 
Option B: Write a service file to the EEPROM, then read the EEPROM and immo data.
 
⚠️ Warning: Using Autel to read/write EEPROM carries a risk of bricking the cluster.
🟢 Alternative: Xhorse VVDI2 is more reliable for this task.
 
Read EEPROM.
 
Enter service mode using VVDI2.
 
Reinstall cluster and program keys via OBD.
 
Transponder Info:
 
Original: Megamos 480
 
Compatible: Megamos 48
 
Cluster Data Location:
 
Micronas CDC3217 + 24C32
 
Micronas CDC3297 + 24C32
 
Micronas CDC3272 + 24C32 (⚠ No immo data in MCU; only read 24C32)
 
Note: For CDC3272, there's no need to read the Micronas chip — all necessary immo data is in the 24C32.
 
Method 2: Skip Service Mode – Use ECU & APB112 Key Simulator

If you don’t want to risk reading the MCU (which stores key info), you can use this workaround:
 
Reinstall the cluster.
 
Forget about reading the dashboard — it's not practical without a working key, and not possible via OBD in AKL cases.
 
Focus on the ECU — read it to obtain the 6-byte CS (Component Security) code.
 
Use the Autel APB112 simulator to get the 7th byte of CS from the key coil.
 
✅ Autel can extract:
 
6 bytes from ECU via OBD
 
7th byte from coil using APB112
 
🕒 This method takes about 5 minutes and avoids EEPROM risks.