2003 ml500 runs 100% but stalls when slowing traffic Starts up runs will repeat

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Starts in morning great steady ideal drive down street about .25 mile perfect acceleration till I need to stop at stop sign to merge onto traffic 90% of the time when I press on gas pedal truck will stall ? If I see I don't need to stop I can just slow down and take my turn playing with gas pedal so will not stall then I gun it and accelerates 100% . Crank shaft changed new fuel pump 5 autozone maf. And then I got bosche maf and all runs well for few day and comes right back ? Code say maf again and again . I do some reports for work on my phone while in truck might be Idleing hr 1 hr or more sometimes and no problem smooth idle I start to go ad no problem accelerating till I spot or slow down in traffic it will stall or I half to through it in neutral flore it and wait till light turn green put in drive and it might hasitate at beginning or be 100% smooth . I bought new wires and plugs but have not put them in cause it runs 100% when it does only at stopping issue so plugs would be bad all the time so waiting to do that ? Everything one this Suv works 250,000 miles bought new and still all original parts except what I changed past 2 months . I read same problems but nobody post the answer to solve problem would like help ? What seems to make the problem better or worse? Only when coming to a stop light or slowing traffic ? If I didn't need to slow down in traffic or coming off exit the truck runs 100% and powerful if I need to got in it How long have you had this problem? 3 months now