I can patch your w209/w211 cluster. If you are interested, contact me at: ki211.patched@gmail.com
In this video, I'd like to share with you my instrument cluster on my Mercedes CLK w209 (can work on w211 as well) with patched firmware which introduces a custom AMG menu with ATF temperatures and oil pressure as well as another separate menu where all information is shown on one page. In addition to that it includes a snake game that can be controlled via steering wheel.