C200 2006 Gear Box


Hello there.I own a MB C200 2006.I already discussed about this issue and you gave me your idea however the problem is getting worse.my car used to shift 2-3 on C mode jercky but smoothly on S mode and that was its only problem.I changed gear box oil and filter the other day unfortunately the gearbox not only became better but got worse.now after start it doesn’t shift up or down and sticks in one gear and after a 30-min driving it gets better and normal and shift smoothly.Could you give me a solution this .Thanks