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I think if the rear fog is being used in heavy rain or snow, there will not be any (or minimal) urgent stops. It's probably more gradual calculated breaking. The amount of times that the rear fog is actually used is minimal so I think overall it is worth the upgrade.
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2018 540d xDrive Carbon Black Metallic on Cognac leather. Spec'd out to the max 
2017 Mercedes C43 AMG Coupe. Black on black |