my first mercedis se500 85,and i need some help.
 

hay,i boat a 85 merc se500,now i have som problems with the car:(1) wene the car is in nutral the engine is runing on abuat 1500 RPM, how do i get it down from ther?, and way dos it hepend? , (2) wene i brack the car start to shack ,and the stiring well is vabreting (like if the ABS is geting into work to erly) how do i fix it from hepning?, thax fo all of the helpers.