Is the vacuum change over valve offered for purchase in the parts shop the same part identified in the MB service manual as a switchover valve that controls the vacuum from the throttle housing to the distributor vacuum control on efi 117 engines?

Thanks in advance,

Knarf

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72 350SL #69
73 450SL Parts Car?
78 450sl Parts Car
79 450SLC - Sold
1985 280sl
87 190E 2.6 - Donated
90 300E-Junked
97 E420