Your first action must be to retrieve all diagnostic trouble codes using a professional-level or Renault-specific scan tool. This is the most critical step, as DTC1525F3 is often a consequence of another primary fault. Look for other codes in the engine, ABS, or transmission systems, and make a note of them before clearing any.
This is a primary suspect. Begin by removing the steering column shrouds to access the cruise control switch connector. dtc1525f3 renault megane 3