Welcome to MercedesShop. I don't have the answer to your question, but since it's a more general question, you may get a better response if you also post it to the Tech Help forum. There's some super knowledgeable folks over there that wouldn't frequent here too often. Good luck.

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Chris

'04 ML500 - 53k, Inspiration Edition, Desert Silver
'11 Audi A4 Avant - Brilliant Black
'87 300SDL sold
'99 C280 Sport sold
'85 190E 2.3 sold