Car drives ok in the summer months,but in the cold months its very had to start

What is your question?

After I took my car to this Benz shop in Mesquite, TX for transmission serving, a few days later when I start the car in the cold months, it shakes vigorously and sometimes I have to start it 3 or 4 times then let it sit for about 15 minutes before I can drive it otherwise it shakes a lot then dies. However, it always easily starts up. Does the AirFlow sensor has anything to do with the temperature? I installed a new Air Flow Sensor and it seems a little better, but it still shakes and I have to still let it idle for a few minutes before driving. In the summer months it starts and run fine. Can anyone help? I dont drive it much in the winter months because it takes too long to idle up. I may just sell it.