Mercedes-Benz CLS550 discoloration and deterioration of transition pieces between side windows on Mercedes-Benz CLS550

Some Mercedes-Benz CLS550 owners report experiencing discoloration and deterioration of the transition pieces between side windows, a common issue noted particularly in the 2014 model. This problem typically manifests around an average failure mileage of 38,000 miles and may be attributed to factors such as chemical contaminants during transport, exposure to acid rain, or potential factory metal defects. Addressing this issue can be challenging, with some owners suggesting the use of specific products like autosol, while others consider replacing or wrapping the affected trim. The process of removing and restoring the window trim can also be labor-intensive, often taking several hours depending on the degree of oxidation or fading.