The dashboard light indicator comes on after pressing the brake pedal the first time after starting up. I've checked bulbs and all work but am not sure if they are the correct p/n. All have nickel/silver bases which I understand they should be as I was told the copper/gold bases run hot and tend to fool the light module into turning on the indicator. I just recently got this vehicle and it appears the previous owner had a problem with the 3rd brake light as it has been resoldered and has a broken holder. It functions but I am not sure it has the correct bulb installed. Auto shops I have gone to do not have listings back to 1989.? I'm wondering where I can get a listing of all correct bulb p/n's used in a 1989 560 SL to verify they are correct before I tear into the light indicator module.