Just my humble opinion.
Save your money for other things
My younger bro driving a Pre FL W204 too and he renewed his 10 years COE last year.
No keyless, no memory package, don't wanna upgrade his infotainment screen size, etc
I had a 2012 FL W204 before - paid CnC >$190k (high COE) - no keyless, no memory package and I paid for the pano roof