Generally this is due to corroded/ old/ poor ground connections. Your engine, frame, battery, and electrical grounds must have good clean connections especially on a fiberglass car. I suggest you purchase some grounding straps and attach them to clean points between these areas( You can't have too many). Sand off and rust or old paint; this should solve the problem. A defective alternator can do the same.
If your lights pulsate while the car is running in your E320, you probably have a problem with the alternator or distributor. This type of issue is most likely electrical.
Remove the fuse.
By pulsate do you mean flicker. A momentary dimming of your lights can be caused by motor loads on your lighting circuits. If your lights dim, this can be caused by a refrigerator, sump pump, garage door opener or other motors sharing the circuit with your lighting.
BAD BRAKE LIGHT SWITCH AT TOP OF BRAKE PEDAL
No. Daytime running light can be disabled without affecting turn signals.
Yes it should while running apply parking brake should go out also should have a little green light on in the instrument cluster when running to indicate being on
bad or failing alternator
a heart,lights,music,electromagnetic waves,your head [when you have a splitting headache]
Right next to the drivers side front marker light, in the headlight area.
you probally have a ground wire off
Try applying parking brake
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