Hey all, im new to the forum. My name is william and i am 16 years old. I recently purchased a automatic 240D with 112,000 origional miles on it. I drove it home 250miles. It did fine but i want to make sure that it will last. I know they last a long time but the automatic transmission is worrying me. The mechanic at the dealer said that it all checked out and it ran fine but im not sure if i trust him. When i drive the engine revs up really high and it dosent shift up unless i let the pedal completly out, if i keep pressing the pedal it shifts up rough and jerks the whole car. When i first got the car it had no transmission fluid in it. We filled it up and it kept having that problem. Do i have a bad tranny or can i do somthing to make it shift smooth??

Thanks!