I just bought my first Mercedes after my Volvo became an intolerable money pit...

Its a green 1996 C180 Classic Manual with about 265000 km on her.

Car passed a technical inspection with the stand outs being:
1.) a stiff accelerator pedal,
2.) steering vibration (apparently the need for tie rod ends),
3.) a brake shudder at speed,
4.) possible valve stem seal issue as there was apparently slight smoking at start up which I've not seen..

I have picked up an issue regarding the fuel gauge seemingly not reading accurately at all? and there seemingly being a slight occasional hunt in the rpm otherwise the car is a beauty for 21 years old

I'm still familiarizing myself with the w202 and will truly appreciate any and all advice from more knowledgeable members of the forum.

What should I look out for and what should I check on and what preventative measure should I be taking to maintain the car correctly.

I am wanting the car to remain in peak condition and remain a reliable and economical daily driver.