Registration-Plate Light Lens

Replacement rear registration-plate lamp lens for the CLK 209 series. The creator supplies two verified author models: one version retains legs for the festoon bulb and one omits those legs. Print in clear filament; the creator recommends PETG rather than PLA for improved heat and weather resistance, a 0.2 mm translucent window, and silicone sealant around the rim to prevent water ingress. Fitment is source-backed only for the C209/A209 generation.