3F0A08 Mercedes Fault Code :
Read the description of 3F0A08 in CPC301T and the engine lights up for CPC301T Common Powertrain Controller code, there are some possible causes for it.
The electrical line between pins 10A17.II-24/4 and 10B03. I-6/4 has an open circuit, a short circuit to battery voltage or a short circuit to ground.