Just saw a C280 at a used car dealer shop with the unusual AMG look! it got the AMG dash/two tone steering wheel, sport seat front and rear but missing the SL600 front brake disc and the 17" amg rim... the car run 16" now!

I run the vin check and it comes out a C36!

open the hood i see the M104 engine but it is no way for me to tell if it is a 2.8 or a 3.6. i check the engine number and it is not match with the vin check web site.....

so my question is, is it a very swap a 3.6 back to a 2.8? how about the wiring? the computer?
thx