Hello you love, I don’t know any more with my car and hope that one or the other already had this problem or even has it!!!! Even in advance self RENAULT doesn’t know what it is!!! So it started a good month ago when I brake (it’s not always and also not at certain weather conditions or anything else) makes the brake such a funny ratter and the brake pedal becomes hard, so I can’t push it through again then after a few seconds it solves s but I’m back at this time when the brake pedal hard gets braked the car anyway… was already at renault a whole day it stayed because there were test drives made but the said problem didn’t occur and therefore you don’t know what it can be…. the bremklötze are still thick the drum brakes in the back were changed last year in the august anyway the brake fluid…… The kfz master of renault told me something about the brem disks but exactly he knew it no whether it would be because (great statement) have also told him that it is quite important for me to know what it is because I have a little child and I also don’t want to ride with people!!! he said to me I should look under what conditions this said rat occurs while braking but it just occurs on sometimes several times a day then a day not at all… I hope it could explain a bit and maybe someone could help me further Loves greeting a worried mommy out North Rhine-Westphalia