The euro 16V comes with a 3.07 LSD which would exactly match your '86 300E. Having owned an '86 300E 5-speed, I think a 3.27:1 LSD would wake it up nicely without hurting freeway mileage too much.

If you end up with the euro 16V LSD you may also want to consider a 16V Getrag close-ratio tranny with 1:1 5th gear. This would really make the car more fun to drive.

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Glen Tokuhara
Beauty & the Beast and the wagon that could!

i bet that getrag is a tough tranny!

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

I have always wondered how much HP and torque that rare 5 speed 124 tranny can handle stock... the 4 speed auto can take upward of 300HP?

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-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/831799-post13.html
http://www.peachparts.com/shopforum/831807-post14.html