I admit, one could object to having additional chrome "bling" on the SL. After all, "SL" stands for Sport Leicht - Sport Light - and the car was intended to be a sportier model. It had aluminum doors and hoods to save weight. Amy addition as heavy as additional chrome decoration could be frowned upon.
On the bottom line, however, it should be about what you personally like on your car. Unless you want to sell it and build one for maximum return, where absolute originality counts, it doesn't really matter what the value is.
My wife and I like genuine oriental rugs in our house. We have quite a few. There is always the discussion how much they are worth and that they go up in price. Frankly, I don't give a hoot about that particular issue. I like the looks and the fact that they are truly handmade and always a conversation piece. My heirs can argue about the value.