Updated 2011-10-26
Märklin 3021, DB V 200 027:
Märklin 3074, DB 216 090-1:
Märklin 3772 B, DB 212 225-7:
Märklin 3774, DB 216 127-1:
Märklin 37500, ONTC RAm 1984:
The conversions made to these models:


Märklin
locomotive
numberMotor
Decoder
Functions
Additional parts
Originally
fittedConverted
toOriginally
fittedConverted
to/with
3021
lfcm 3*
no change
Analogue
no change
tripple A front light on when driving
3074
dcm 3*
dcm 5*
6090Analogue
6090
f0 = front light, changing with direction
3772
A
lfcm 3*
dcm 5*
609046080
prototype60932
mfxf0 = front light, changing with direction
f1 = interior light RH side
f2 = interior light LH side
f3 = driving sounds
f3 = shunting speed
f4-f15 = other sounds and functions456200 holder for decoder
2x 28V T1 bulbs for interior light
2x 2-pole SIL as bulb sockets
B
lfcm 3*
no change
6080
prototypeno change
f0 = front light, changing with direction
3774
lfcm 3*
no change
6080
prototypeno change
f0 = front light, changing with direction
37500
dcm 5*
no change
c91
soundno change
f0 = front light change with direction
f1 = interior light in the cars
f2 = bell
f3 = horn
f4 = acc/brake delay cancel