1988 Mercedes Benz 300se • 6 cylinder 2WD Automatic • 140,400 miles

I have a 1988 Mercedes SE. Last week, my left brake light was out. I took out the bulb and it was bad. I had to go buy one so I put the tail light assembly back on. Then both brake lights and the rear window brake light wouldn't work. I replaced the bulb and the fuse but all brake lights still don't work. Any ideas? Maybe the brake pedal switch? How do you check/replace it? Thanks for any help.
February 27, 2011.

Find the brake switch and disconnect it, jumper the connector and check if the brake lights come on. If so adjust or replace switch

Feb 27, 2011.