Thanks so far for advice. Sorry for delay, mechanic away on holiday and me working.

So i dont really understand this so here is what I have bought, if I am wrong, please correct me.

1st pic is the old housing with cams in place.

2nd pic is the new housing :
10188 Mercedes-Benz C123 280CE Coupe Camshaft Bearing Casing 1100163304

3rd pic is the new exhaust cam:
4673 Mercedes-Benz W114 280CE Coupe Engine Camshaft Exhaust Side 1100511601

4th pic is an inlet cam i bought but doesn't fit?!?

IMG_5267.pdf

Screenshot 2022-07-18 at 16.56.14.pdf

exhaust cam.pdf

inlet cam.pdf

Any help or adv ice appreciated as i dont understand any of this anymore.