Serial number ?? I assume we're talking about serie 16 with keypad.

Error C25= Output stage error, for example the truck show this error when any hydraulic solenoid is not connected. This error is usually caused by a broken mast loom (for carriage solenoids lose their feeding). So check first the mast loom.

Error E111= brake pedal potentiometersupplies incorrect voltage

What about your mail??.

Regards