Hey everyone,
Hope you're all doing well, and hope you can help us diagnose our lighting issue on our 96 E300. I've searched and can't find the same issues occurring together.

Start the car, "Lamp Defective" comes on. Hit R button and it clears.
Put the car in Reverse, No reverse lights.
Use turn signal switch- no turn signal lights, no clicking sound from switch.

All bulbs appear to be okay. Depress the hazard button and all bulbs flash. Brake lamps all light up. Headlights are good. Parking lights light up. Checked all fuses and all appear good. The only other possibly related issue is that the 3rd brake light quit lighting up about 2 years ago despite a good bulb, and we found that no power was reaching the light- so we spliced into the left brake lamp wire to pass inspection. Both of those bulbs light up with the brake pedal depressed.

Ideas?