The late MB 12 isn't exactly what I'd call reliable.... it's known to blow out the oil cooler o-rings if pushed hard. If it weren't that the oil cooler is in the valley captured by the cylinder heads.....you get my point. From what I've seen as a professional mechanic is that all 12's have the same problem. They simply don't get the engineering that goes into more popular, higher production models. They get rushed through development and into market in a desperate attempt to out-do the other guys poorly engineered attempt at a V12.

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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