Mercedes-Benz E320 back windshield breaks or pops spontaneously, replaced twice due to heat exposure on Mercedes-Benz E320

Some Mercedes-Benz E320 owners report experiencing spontaneous breakage of the back windshield, particularly in hot climates like San Jose, California, where temperatures can reach around 90F. They note that excessive heat causes the glass to expand and contract, weakening it over time and increasing the likelihood of shattering. Additionally, owners have observed that damage to the window frame can exacerbate this issue, as it affects the support and cushioning of the rear window, making it more vulnerable to temperature fluctuations. Furthermore, some owners report consistent breakage of the Nylon part holding the cable ends in the rear window regulator on hot days, highlighting the impact of heat on vehicle components. To mitigate these risks, it is advised that Mercedes-Benz E320 owners park in shaded areas and use sunshades to minimize heat buildup, along with regular maintenance and inspection of the rear window and its components to prevent issues from worsening due to heat exposure.