The theory behind the "fluted" 116, 123, 107, 201, 126, 124, 129, 140 tail-lamps is that the design with the recesses and extended horizontal "bars" is so that accumulated dirt and snow do not obscure the lamps. The recessed areas will not accumulate the dirt/snow and thus will continue to glow/shine when the brakes are applied, even if the rest of the rear of the car is badly obscured with grime, dirt or snow.
I think it is debatable whether this works or not, but it's a nice thought, and nice to know that MB was thinking differently than most manufacturers along these lines.
I think it is debatable whether this works or not, but it's a nice thought, and nice to know that MB was thinking differently than most manufacturers along these lines.











