Crackling in gear shifts

My vehicle is 2008 model peugeot 206 1.4 Fever petrol automatic gear.

I bought the vehicle 1 month ago and had all the maintenance done. .

When I lower the mosque while parking the vehicle, I hear a crackling sound like an electric shock at the front left (when I take it to d and r).

When I showed it to the master, he said that this sound came from the relay and it was normal.

Any malfunction in the vehicle. does not make an indication. It is at 107 thousand km.

Is this a normal situation? Thank you for your comments.

Yours sincerely.