Yeap,
it where good&fun times back then, here some excerps of an interview with
Dario Franchitti, who at the time was one of AMG-Mercedes drivers:
“It was the complete opposite of spec racing. It was brilliant. It was “anything goes” in terms of technology. (Driving) the Mercedes was the first time I'd used a sequential ‘box,’ it had that beautiful V6 engine, ABS brakes…those cars were so special. (Tony) Kanaan drove them at one point and sometimes we’ll sit and talk about it, or some of the guys will ask me about the cars, and they can’t believe what they did.
“They had movable ballast, they had anti-roll bars that were electronically adjustable, not only corner to corner but through the corner so you would adjust them for braking, for turning, for running through the apex, for power down on exit. They had full active aerodynamics that moved the center of pressure forward for braking; the radiator inlets had shutters that opened and closed depending on the cooling needs. Those things had airbag steering wheels, man. I mean, come on. They had airbag steering wheels! Nobody had that then or now. You just played with everything to tune that car, man. We had all kinds of crazy things. We even tried a full ground effects DTM car once…those regulations allowed Gerhard and the AMG boys to come up with some crazy stuff!"
the first car (1994) had two tanks one behind the rear axle and one in front of the rear axle.
The driver could (during the later stages of an race)pump fuel from one tank into the other to change the general balance/handling.
Similar to what you do in large aircrafts.
Butthe system was too slow to account for dynamic events, such as braking etc.
The movable ballast was on a kind of sleight/rail system in the transmission tunnel. THe hydraulic made the operation quite fast, and a pre-programed computer map would control the position duing the lap.
The driver could use offsets and factors to change the mapping, similar to what they do now in F1 with there diff and throttle maps.
Another (more esoteric) option would be to mind about the use of mercury for such an application - just kidding