Hi Guys

I'm trying to fix a front end rattle and new to me 1992 124 E200 (Euro).

I have replaced the centre link (ball joint shot) and tightened the front bearings and steering box. I pushed and pulled all other components and everything seems tight. I cannot reproduce a rattle from the front by kicking, shaking the wheels but it still feels loose going over those cobble stones like bumps. The work I did above have removed at least 90% of the problem but what am I missing? Could it be
a) Ball joints
b) Roll bar bushings
c) Idler or steering box
d) LCA bushing (rubber looks new)

Thanks
Oreo