Rear fog light question?
#2
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2008 E350 4matic; 1986 500SL
Yes, this is normal. Rear fog only lights up the driver's side as mandated by law in many European countries. Lighting up both sides could confuse other drivers who might think the brakes were being applied.
#3
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2012 CLS63
have one on my volvo too...........the rear left brake light gets brighter......like you mentioned