I am eying a friend of mine's 1995 CL600 with 20k miles to go with my s600 4 door. Anything I need to know about the car as in historical problems, bec. my 1995 s600 has had a history of problems. I wish to take the car and add 18 AMG monoblocks, paint the bumpers white to match the body and tint it. Any other suggestions, maybe an exhaust....How will it effect the car.