MB Doc,
Thank you for your reply.
Is there a trick to finding out which tail light it is? All bulbs are lit. Can I buy the "current drop cable" for the two inner headlamps from MB or is this something that is put in the new wiring harnesses to take care of the problem on newer cars? How is it installed--I am mechanically inclined--just wire it in series with the existing wiring?

Thanks

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John B