Hello...Every 1.

I really grade that, I found this site.
giving me so much information and knowledge.

Well..first, I bought my 540I 4 years ago, with 60k on it.
Right now it's 110k milles on it.(Can't see millage clearly, cuz dashboard is so messed up, like most computerize option on dash board. Can't even read warning signs, CD track numbers..so sad, I wish I had normal dashboard)
Last few days, I was gonna trade my bimmer once, but I couldn't and never will..cuz I spend so much $$$ in to my bimmer for repair.. like replace my radiator like most 540 model. still I have to put coolant regular base, every 1-2 month ($800 local repair shop), power lock system(stuck and wont open. $900 at dealer), and one Cat. Converter at dealer price of $2k.(dumb choice). right now I need to change the other Cat. converter.
Right now, I must replace my front shock. Since I put 19" Axis Milaon+ got worst. When I drive and turn left, it sound like "grrrrrr~~". cuz front right side shock is really bad.
Please, guys help me out here, (1)Do I have to replace all 4 shocks? instead of change just two front shock?
(2)I have Sports Package on my bimmer, Since I have heavy 19" wheels. Is it better to replace with sports shock?? other then OEM shocks?
(3)One of rear window is stuck and wont go down. Can I fix myself? or just go to repair shop.but they ask me for $400 bucks.
(4)I read post here about driving at 50-60mph vibration on steering wheel. I was surprise. I thought I was only one have that problem..Thanks. I'll try to learn to fix myself.

I really appreciate for read my post, and sorry about my broken english.
I won't trade my bimmer until engine worn out.
I'll be stick around and see me often try to bother u guys..d^0^b
Thank you and have wonderful day...

DJKraft
Northern Jersey