The '94 sedans are 2.65:1, a lower ratio than your car, would improve fuel economy and reduce highway RPM. I believe that the wagon is the same.

The only downside would be a little slower launch.

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Gone to the dark side

- Jeff

Thank you, Jeff!

So lower ratio will reduce RPM's and higher will increase? That exactly opposite from what LKCHRIS mention from previous post....
Also, do you guys know if its direct bolt in swap?
I believe i saw somewhere on this forum or another Mercedes forum spreadsheet or PDF file with all model and diff listing ratios... Have to digg for it...

Thanks again, Jeff!

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1987 300D Turbo 170K (sold)
1990 300E
1992 300D 2.5 Turbo
2003 Audi A6 4.2

A 3 to 1 ratio is faster then a 4 to 1 ratio. In any rear axle or differential numerical set up, the "1" refers to the axle making one revolution. The other number like 2.88 or "3.0" or 3.07 or 4.88 or 7,20 and more on cars and big numbers on big old gasoline powered trucks refer to the number of times the drive shaft rotates, (or engine crank rotates) if the vehicle is in direct drive.

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

I think i found that spreadsheet/pdf with w123 and w124 differential info...

Attached Files

acceleration_specs.pdf (37.6 KB, 380 views)

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1987 300D Turbo 170K (sold)
1990 300E
1992 300D 2.5 Turbo
2003 Audi A6 4.2

"Lower" and "higher" refer to the road speed at a given engine rpm. That is standard industry terminology.

Therefore, for example, a 4.11 is "lower" than a 3.83.

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles

I agree, provided one doesn't say "lower ratio" in which case it refers to lower numbers. "so top speed will be reduced and highway rpms and fuel use will increase" would indicate a slower rear screw which the '94 doesn't have. (ref: post #2)

__________________

Gone to the dark side

- Jeff