2009 transmission

I am considering buying a 2009 E350. I ran a VIN check and it shows that it has a 5 speed. I was reading another thread about someone running a VIN check on a 2009 E350 and it said he had a 7 speed. Were both of these transmissions offered in the same models? I read that the 7 speed has the shifting problems. Is the 5 speed also troublesome?

I am in US (Michigan). Does it have to do with the difference between 211 and 212?

Thanks for any info and advice.