Date registered: Jul 2004
Vehicle: 1987 560SEC Now 145K mi. (Summer 2016)
Location: Boston, MA area
Mentioned: 0 Post(s)
Quoted: 112 Post(s)
RE: what does this sign mean?
You can narrow the diagnosis a bit pretty easily.
Refrain from having your foot on the brake pedal during the first part of this short test.
When you first turn on the ign. all the warning lamps will light as a 'bulb check' before the engine is started. As soon as the engine starts they all go out. Leave engine running & trans. in P, for now.
If a park lamp or taillight is out, as soon as you turn on the parking lamps that warning lamp will come on and stay on while the circuit is energized. A walk around the car will tell you which is out.
If the bulb remains unlit (engine running), then comes on when the headlights are turned on..... headlamp bulb.
OK so far? With the engine running, put your foot on the brake. If the warning lamp comes on there you go, it is one of them. Also, the thing about the bulb failure light & brake lights is different than the other circuits. If a brake lamp bulb has failed the lamp REMAINS LIT, even with your foot OFF the brake pedal.
When you shut off the ignition the bulb failure circuit resets itself.
So, if that bulb light stays on during the day (no lights on), one of the brake lights is out. Been there with my 126.