I did a quick search for a similar project and found this for reference.
HOW TO:
Fit a C43 AMG front bumper skin to a W202
HOWTO: Fit a C43 AMG front bumper & fogs W202 - MBWorld.org Forums
I have no idea why the size difference in that second to last photo.
The caption reads:
Quote:
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For those who are new to W202s, this is a good shot showning the differences in the standard facelift bumper agaist a C43 AMG bumper.
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I find it interesting that the stock bumper/spoiler has splitter chimes on it, but the AMG does not, and may act as wheel spats at the far ends thereby allowing more air flow under the vehicle body at the middle.
I suspect AMG enhances the already impressive stock partial belly pan so that the extra flow is managed somehow.
I suspect the AMG bumper/spoiler is deeper and lower than the stock one.
I have no data on the AMG verses stock Cd or CdA, just looking a pictures for reference.