How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Lou P. master tech Your Own Question
Lou P. master tech
Lou P. master tech, Mercedes Technician
Category: Mercedes
Satisfied Customers: 4148
Experience:  15 years master certified 100% fix rate and have access to factory radio codes, wiring, and instructions.
27644750
Type Your Mercedes Question Here...
Lou P. master tech is online now
A new question is answered every 9 seconds

2005 S500 base. "Stop Lamp Drive to workshop" warning is on.

Customer Question

2005 S500 base.
"Stop Lamp Drive to workshop" warning is on.
When I drive, all 3 stop lamps are on constantly.
If key is out, the stop lamps turns off
It is draining battery.
With the engine on, if I open any door, the stop lamps turn off.
If I close the door, the stop lamps turn off.
Submitted: 1 year ago.
Category: Mercedes
Expert:  Lou P. master tech replied 1 year ago.

Hello , your original statement is a little confusing. Can you go over it and make sure it is what you are describing exactly ?

Expert:  Lou P. master tech replied 1 year ago.

If the lights are sticking on and the dash says lamps defective you may have a control module issue. Let me know if you plan to fix yourself or what not and I'll do my best to help.

Customer: replied 1 year ago.
When I drive, all 3 stop lamps are turned on.
When I am parked and open the door (any of 4 doors), those stop lamps turn off.
when I close the door, all 3 stop lamps are turning on.
When I turn the car off and pull the key out, all 3 stop lamps turn off
Expert:  Lou P. master tech replied 1 year ago.

Ok. Thanks. That makes some sense. Did this happen out of nowhere ? Or was a bulb replaced recently ? Or rain ?

Customer: replied 1 year ago.
The warning light came on about 2 weeks ago. and noticed those stop lamps are on when I am driving.
Not too much rain lately.
I think it is draining the battery. I could not start the car a couple of times. It started when I jumped the car.
Expert:  Lou P. master tech replied 1 year ago.

Ok , what may have happened is a control module got damaged during the jump start.

Expert:  Lou P. master tech replied 1 year ago.

Are you pretty good with cars if I give you some things to try ?

Customer: replied 1 year ago.
Please let me know what to try so I can pin point what can be done to fix it.
Expert:  Lou P. master tech replied 1 year ago.

Ok first I want you to access the brake light switch and unplug it. It is located above the brake pedal.

Expert:  Lou P. master tech replied 1 year ago.

It should have 2 connections on it. If you unplug it and the lights stay on when the car is started it tells me there is much more wrong.

Expert:  Lou P. master tech replied 1 year ago.

You will have to remove the under dash black panel to see the switch.

Expert:  Lou P. master tech replied 1 year ago.

Hello checking back to see how your doing