What problems should i look forward to on my early W220

[BmwTek]

Hey guys I have a 2000 S500 which we just recently acquired... what problems should i be looking forward too??? I am still in favor of our W140... the W220 seems too "Jap-Like" I am just wondering however what should i expect? I already had to take it in for a check engine light.. (bad mass airflow) that cost me a pretty penny.. dealer didnt accept any warrantee.. i was over 124miles.... well thats what i get for holding things off i guess.. next up.. brakes.. i hear the rear brake rotors warp easily.. they do squeek while i stop reversing... so i guess its the rotors.. my brake pads also require replacement thanks to the great little icon flashing on the dash.. what else can i expect??? the suspension seems uneven while parked over night.. airmatic problems??? I dont know guys.. I will happily admit that i switched over to Benz.. but the thing is.. i am starting to feel the same way i did with the old 7er... Help me out.. thanks again..