Yeah... nah. They are not the right ones.
Looking at the specs of the SL rims, it appears that the ET is -17mm lower. While moving the wheels towards outside is always welcomed (and it baffles me that manufacturers do not care about this important visual aspect), you'd have to check if the wheels would fit in there. I have no idea how much room there is.
Watch out for the offset and width of the double seven-spoke rims because W/S212 and A207 do not share the same rims even though they look the same. And the 212 runs 10mm narrower tires compared to your CLS. However, that is not an issue.
W212
48,3 cm (19") AMG Leichtmetallräder im 7-Doppelspeichen-Design hochglanzschwarz lackiert und glanzgedreht
245/35 R19 auf 8,5 J x 19 ET 48
275/30 R19 auf 9,5 J x 19 ET 48
A207
48,3cm (19") AMG Leichtmetallräder im 7-Doppelspeichen-Design hochglanzschwarz lackiert und glanzgedreht
235/35 R19 auf 8,5 J x 19 ET 44
255/30 R19 auf 8,5 J x 19 ET 44
C218
48,3 cm (19") AMG Leichtmetallräder im 7-Doppelspeichen-Design hochglanzschwarz lackiert und glanzgedreht
255/35 R19 auf 8,5 J x 19 ET 35,5
285/30 R19 auf 9,5 J x 19 ET 48
I think the 7-spokes for the CLS have only been available in the awful chinese black/silver style as part of the Nightpaket.
BTW, what about the forged 5-spoke rims on page 40?
Think they are the same design as on the new C AMG coupe, but again, the offsets are different (ET37/52). You'd have to get spacers installed.