Check your light headlight sealed beams. (i assume that you have US light set up) One or more of the filements on the low beams are probably out. I shifted to euro tpe on my 450 sl 1977. Still have original USA lights and complete surrond for sale ($100 plus shipping) may need re splicing. good luck Abe G pS Also original great shape steering wheel (black) with star. original vynil. (switched to leather) also $100 plus shipping.