Engine Shuts Off

Hello ,

My car has this problem , the engine shuts off when it is cold , transmission is  manumatic-
tiptronic , it shuts off in every gear (P/D/R) , local auto-service told me that it might be an issue of
Mass air flow sensor , so I tried to change it but the problem was the same , I changed it twice (
bought newer ones ) , the problem was the same , but when I try to plug it off the problem goes
away and car works good , I tried to check car for diagnostic codes but there is no error code ,
actually this problem appears in cold weather , when the engine is really cold , the car had no
problem during summer , but appeared now ( had this problem last year also ) ,

I tried to search online about similar problems but can`t really guess what is the problem ,

So main guess was Mass air flow sensor but i changed it twice and problem was the same , I
tried different gasoline , cleaned throttles ,


Please give me some advice , I was at 3-4 auto-service , no one really helped , everyone
suggested that it was problem of Mass air flow sensor but after changing it they were out of ideas
, if you had some similar problems please suggest how to fix it


Thanks in advance