Automatic Coding
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2000 Mercedes-Benz SLK230, 2000 Mercedes-Benz C230, 1999 Mercedes-Benz SLK230, 1999 Mercedes-Benz C230, and 1998 Mercedes-Benz SLK230. However, it is still accessible from the selected car via links, so may be relevant.
Before removing Engine Control Module (ECM), using HHT, read and store existing version code. After installation of new module, download previous version code using HHT.