The trunk lights won't come on, on my 92 Mercedes 600 sel All fuses are good. Where is the switch located on the car that turns these lights on?

blown fuse

As you might guess one fuse box is located in the engine compartment and there is a second one is located in the trunk I believe near the battery. The car designation is W140.

back of motor where transmission meets, some on top some on bottom, follow the positive battery cable to it.

check all wires to starter motor for bad earth.....make sure power reaching starter motor.....check starter motor isnt stuck

Hello and welcome to FixYa!

If everything is good then the problem will be the control column lever switch. It surely is fried that's why it won't communicate to the cruise control. I strongly suggest that you have the control column switch replaced to resolve the issue. You may get one from the junkyard to cut the cost.

Hope this helps and thank you for using FixYa! Have a good one!

You may have two separate issues here. First as for the brake lights not working I'm guessing they all went out at once. If so there is stop lamp switch located on the arm of the brake pedal. If this switch stopped working then you will not have any brake lights. The panel underneath the dash has to be pulled out in order to see the switch. As for the locks not working the pnuematic pump which supplies vacuum for the central locking to work may have either quit working or shut down due to a vacuum leak in one of the vacuum elements. To check this go to the fuse panel in the trunk and look for the fuse for central locking and remove it for a few seconds and re insert. This will reset the pump and allow it to work again. Try the locks a few times to see if they are working. If they don't work right away then you may have a bad vacuum pump for the central locking. The central locking pump is located under the rear seat cushion on the passenger side. Hope this info helps you out if not let me know and I will try to do what I can to assist you.

Check ASR system. Wheel sensors would be a good start because thats what the system checks for speed difference at the wheels. It reduces power to keep you straight on the road.

In the driver's side trunk along the wheel well and behind the wheel well cover you will find the sunroof motor. There is a plastic knob that can be turned to close/open the roof manually. The socket tool is part of the original toolkit that came with the car, but otherwise, you can locate one that will fit. Don't use pliers as the plastic easily breaks. Meanwhile, have you looked at the fuse or toggled the switch hard to work? If the motor works, but doesn't move there is an adjutment on the motor's clutch that can be tightened. Hope this helps.

can you go through the trunk and open trunck from inside. or open hood and try to jump power to the starter hot eire and ground to engine turn key on and use remote to open trunk.......

quick check, use a test light and test the switch for power then check to see if power goes through when you apply the brakes. the switch is under the dash attached to the brake peddle arm