Bad vibration coming from my 1997 c 200 auto.It could be felt through the arm rest in the front of the car...it was when the car was cold and it lasted for about a minute and then disappeared...any ideas what this might be,Also the car is a little dead of late...thanks

 

Could be one of your pulleys or a belt. Have someone else start it while you watch the engine. Watch the belt, water pump, etc...