Hello, I have a Citroen c5 1.8 from 2003. Half a year ago, I replaced the clutch kit. The reason was the vibration when starting. Since then, I've done about 4,000 km. I have been having a hard time going in gears for some time. I will add that after firing on the cold, they go perfectly without any resistance. After the engine is warmed up, problems with shifting gears begin. Something seems to get caught somewhere. The problem is gradually worsening. The clutch is founded by Luk. What could be the cause? Thanks for the hints. Best regards.