The third (high) brake light housing may melt, resulting in a loss of electrical contact for the light, which stops working. A complete housing (contacts and lens) is needed to repair the problem. On certain vehicles, if this happens, the anti-lock brake system will not function. The brakes will work in normal mode, but not provide the ABS control.Google+
Car Problem Reports
Mercedes-Benz E320 Third (high) Brake Light Housings May Melt
Mercedes-Benz E320 Problem
Average Mileage: 104,500 mi (75,000 mi - 148,000 mi)
Visitor, 1996 Mercedes-Benz E320
all brake lights broken
Visitor, 1998 Mercedes-Benz E320, 135,000 mi
Brake light housing (twice)
Visitor, 1996 Mercedes-Benz E320, 105,000 mi
I try to change the lamp. When I touch the housing it just break in little parts.
Visitor, 2002 Mercedes-Benz E320
Third brake light housings melted but only caused it to not operate.
Visitor, 1996 Mercedes-Benz E320, 84,000 mi
Bulb did not want to connect properly on one side .Wasn't flush. Used dab of gorilla glue on the area no problem since. Lamp defective light hasnt come back on. Yet!