general problems of the 2004 Mercedes Benz C240

I was driving to work from parkville to baltimore city and my car began aggressively jerking. I drove my car on Friday morning through the tunnel and the jerking was not as aggressive. I drove home on Friday afternoon from work and I could tell that something was still jerking but continuously. Saturday morning my car was jerking so aggressively, I called owings mills mercedes and left it there. I was notified today, may 27, 2015, that my car needed between $1900 and $7500 worth of work. My coolant is leaking on the transmission. If my radiator can not be fixed, I will need a new radiator as well as transmission. I have doing research and this seems to be a common problem with the c class mercedes. I feel this should be a recall issue.