My powered railcars from Märklin:

Updated 30.12.2008

Märklin 3016, DB VT 959 190
Photo will come later

Märklin 3016, DB 795 299-7

Märklin 3028, DB 515 023-0
Photo will come later

Märklin 3425, K.W.St.E. CidT DW8, Kittel
Photo will come later

Märklin 3605, SBB RCe 2/4 203, Roter Pfeil

Märklin 39970, DB 701 033-3

An overview of these models:
Märklin
locomotive
number
Motor Decoder Functions Additional parts
and comments
Originally
fitted
Converted
to
Originally
fitted
Converted
to/with
3016 sfcm 3* no change Analog no change    
3016 sfcm 3* dcm 5*
60903
Analog 60903 f0 = front light, change with direction
f1 = interior light
f2 = rear red light if f0 on
f4 = acc/brake delay off
458820 holder for decoder
3028 sfcm 3* dcm 5*
60903
Analog 60903 f0 = front light change with direction
f1 = interior light connected cars via relay
f2 = rear red light if f0 on
f4 = acc/brake delay off
458820 holder for decoder
3425 bell no change Delta 60760
decoder
f0 = front light change with direction
f3 = interior light
f4 = acc/brake delay off
 
3605 bell no change 6081 60922
mfx
f0 = front light, change with direction
f1 = interior light
f2 = front upper beam, if f0 on
f3 = shunting speed
f4 = acc/brake delay off
456200 holder for decoder
2x light guide for upper lamp
2x red smd LED
39970 soft
sinus
no change mfx
+ fx
no change f0 = front light change with direction
f1 = horn
f2 = driving sounds
f3 = shunting speed
f4 = acc/brake delay off
f5 - f12 = other sounds
additional function decoder:
f1 = bridge up/down
f2 = bridge left/right
f3 = pantograph up/down
f4 = initial bridge setting