Star 3 Coding
Star 3 Coding
Learn how to perform Star 3 coding on Mercedes-Benz vehicles using timeback and enhanced certificates.
Overview
Star 3 coding allows you to modify ECU configurations on Mercedes-Benz vehicles. This guide covers the timeback process, which is essential for accessing older certificate types that enable coding operations.
What is Star 3 Coding?
Star 3 coding refers to the process of modifying ECU (Electronic Control Unit) configurations on Mercedes-Benz vehicles. This includes:
- Enabling or disabling features
- Adjusting vehicle parameters
- Modifying ECU behavior
Prerequisites
- Diagnostic Toolkit 9 (DTS) with a SeCOC project
- AFTERSALES_ENHANCED certificate valid for 2025 (available from our ZenZefi service - coming soon)
- Access to the target ECU (not the EZS223 gateway)
- Timeback tokens (25 tokens per ECU)
Quick Links
Important Notes
- You cannot perform timeback on the EZS223 gateway
- Each timeback request costs 25 tokens
- The ECU certificate must start with
62,01,83, - After timeback, you can use Development Enhanced and Variant Coding certificates for coding operations
- At the end of coding, you'll need to sync the time back through SCN Secoc Sync (coming soon)