i have hyundai i20 crdi 2012 modl having vin number MALBB51RLCM434977 and registration number is MH04FR7786.since i have bought the car i m facing engine knocking and vibration problem till now since 15 months.but the hyundai is not able to solve the problem.so many times i have given my vehicle to workshop but they were not succeeded to resolve the problem.hyundai doesnt care about thier customers.i have written 3 to 4 times to hyundai about my problem but no positive feedback from hyundai company.only thing they did was they keep my vehicle in workshop temporarily repair and return to me.shame on hyundai.