I would appreciate some feedback / advice on what I hope is a simple question.

I own a year 2000 ML 320 and have noticed that the newly "updated" year 2002 and 2003 ML series, in addition to a whole range of other new features, have a tail light assembly that, besides new plastic, is different in the following way:

The "old" ML series had a single red tail light that lights up in the back of each light assembly (facing away from the rear of the car). However, the newer version has an additional red light that is located slightly lower than the other and instead shines away from the side of the car - it is located closer to the bottom and more forward in the tail light assembly.

So here is my question: can one easily upgrade from the old tail light assembly to the new one, or is there a major wiring change, or some other variable (such as wattage, or amperes) that will be changed and could create problems if I get this done ? If it is an easy upgrade, what is required to perform it ?

Sorry if my description appeared a tad pedantic - I just wanted to make sure everyone understood what I was describing, without the benefit of a picture.

Thank you very much for your assistance and feedback !

Hans