As part of my future R129 SL track day car, I'm investigating throttle bodies. The end goal is to develop a streetable motor in the track car, transfer it to the road car, then develop something more involved for the track car.

97 M104 3.2L Running Bosch ME 2.0 / 2.1 ( depending on whose info you use. )

Stock throttle body
MB 104 141 00 25 Bosch 0 205 003 042

Bore 70 mm
Max possible bore 75 mm
Bolt pattern 4 on 70 mm square
Hose hub 83 mm

From comparing pictures, the M119 ? ( mid / late 90's SL500 motor ) has a larger bore but same pattern. Anyone have one to confirm? Part numbers are helpful too. Non MB throttle bodies ar a possibility as well.

One of my early steps is to disable the servo motor and rig up a direct throttle cable. Has anyone tried this?

There might have to be some fooling of the computer so it does not go into limp mode. My 97 SL320 road car has the same system but throttle response is soft hense the reason for a direct connection.

The issue isn't that the motor it self lays down, it is that the throttle seems to lag in opening. Also, in a forced multi gear down shift from say 3 to 1st, The motor just hangs there 1000 RPM over pre downshift while the trans and throttle catch up to each other.

Thanks