I think you are talking about MB# 202 460 00 75.
Parking Interlock Pawl...(Ignition Switch Housing)
It should fit together very easy, I have replaced several of these because of damage.



Item Number: 2024600075
Main Category: Mercedes Benz
Sub Category: Steering
Description: Parking Interlock Pawl...(Ignition Switch Housing)
Weight: 0.100


Have a great day.

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