308 available cruise control not working.

Hello dear forum residents. I have a 2014 model peugeot 308 and the cruise control arm was not admitted later. A peugeot with the same model and the same dealer outlet with the same features is also available to my friend. The cruise control in me is doing what you know, I think sometimes it doesn't feel ready to fix the speed :) let me explain, the speed limiter works hard, but the cruise control gets stuck according to the head, trying 20-30 times. There is no problem in the other vehicle (my friend's vehicle) with the same features. In your opinion, for what reason this problem may be caused by me. thanks in advance

First of all, welcome to us. Possibly the arm may be faulty. I suggest you change the arm and try

Thank you. I will definitely evaluate your suggestion, but after a few interventions, I realized that it may be related to the brake light after the intervention, because the brake lights are always installed, and the vehicle was deemed defective due to the brake lights remaining and I could not get approval from the examination. cruise control will probably recover when I solve the brake coupler problem. thank you for attention.

It is very likely brake brake then