The E320 (w124) utilizes a 2.65 rear, regardless of whether or not it has ASR or ASD.

As far as a replacement diff would go to increase your "off-the-line" performance. I am unsure. Someone here on the forum has got to have an idea of what would effectively work for you.

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1994 E500 (MY SUNDAY DRIVER)
1993 190E SPORTLINE LE W/ M104 SWAP
1997 C230
2002 ML320
2000 BMW 528I (WIFEY'S CAR)

"Excuses are crutches for the unfounded."