Help me Identify a part Please

[l_turn9]

Hi Ya'll - I need to replace my Alternator but am unable to remove it. I checked various postings/ videos and Tech Articles but my 06 E350 is different from any I have gotten help from. There is no room to lower the Alt downward and pulling it out upward is blocked by a gizmo bolted to the right cylinder head. Looks like there are 3 or 4 bolts/screws holding it in place. I have a WSM but it's not very user friendly and I have been unable to find this part (mostly because I don't know what it is!) ;-)
It has several vacuum hoses going to it and an electrical connector also. Check out the photos -- hopefully they will help with the ID...

TIA!

[muller]

Maybe some purge valve????

[nulu]

its the air diverter valve , use a 30 torx bit to remove the 3 bolts and dont drop the gasket, reuse it

[l_turn9]

Thank you both! You've been very helpful! update - Got it out exactly as you described. Also removed the Alt and hopefully can install the replacement.