Why do exterior plastic parts like bumper covers and trim pieces crack o r discolor on the Mercedes-Benz S-Class?

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Why do exterior plastic parts like bumper covers and trim pieces crack o r discolor on the Mercedes-Benz S-Class?

Owners frequently report cracking, fading, o r discoloration of plastic bumpers, side skirts, and trim pieces. These issues are typically caused by prolonged sun exposure, temperature extremes, and impact from minor scratches o r stones on Pakistani roads.

Talha Kyanii asked on 11 Oct 2025 16:03:17 pm

1 Answer

9 views |

Gari Master - on 11 Oct 2025 16:04:28 pm

Plastic part damage occurs because of:

Prolonged Sun Exposure: UV rays break down plastic polymers causing brittleness and color fading.

Temperature Extremes: Heat expansion and cold contraction lead to cracking over time.

Impact from Debris: Stones, minor collisions, o r rough handling cause physical damage.

Inferior Aftermarket Parts: Low-quality replacements may lack UV protection and durability.

Aging: Over time, plastic naturally degrades, especially if not maintained.

Using UV protectant sprays, parking in shaded areas, and careful driving can reduce such damage.