I'm pretty sure it would make you quicker on the road. The 4-m in the 124s provides insane traction on slick or dry surfaces. I had a conversation with a mb master tech that had an opportunity to participate in a track day in the early nineties with the then new models. He asserted the 4-m wagon was consistently the second fastest around the track behind the cossie. Obviously not because of horsepower.

If you want to know if a car has 4-m then drive it with a blatant disregard for physics. If it handles like the hand of god commands it then you have a 4-m.

__________________

90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff