W140_95

Wasup folks! I jus got my first merc!! And I'm gettin together for the road, jus tryn to weed out all the issues... The car has been sittin for over a year and it smokes wen it runs. White smoke it's not too bad I jus assume gas is old and needs to be drivin for a while but I do have an issue with the asr and brake light can't seem get get them off. I replaced the brake light switch under the dash but still no luck the car doesn't go into limp mode either any suggestions!? Also the radio doesn't light up or work and I replaced the fuses!?