Pin to old MERCEDES-BENZ is as follows
(not all modules available, on all cars):

original proscan automotive not a cheap copy

1     Ground
2     Voltage, cirquit 87
3     Battery, cirquit 30
4     LH sfi or right LH.SFI controlmodule or ME-SFI or right ME-SFI engine control module or HFM-SFI control module; EDS controlmodule
5     Left LH-SFI control module or right engine control module ME-SFI or HFM-SFI engine control module or EDS controlmodule
6     ABS or ABS / ASR or ASR / PLC or ETS / PLC or ESP / PLC control module
7     EA / CC / ISC control module
8th     Base module
9     ASD controlmodule
10     Transmission Control module (TCM or ETC)
11     ADS controlmodule
12     PLC control module13
13     TNA signal (LH / Me / Diesel )
14     O2S (LH)
15     O2S II (LH) or instrument cluster
16     A / C pushbutton control module
17     DI controlmodule or TD signal ( Diesel ) or TN signal (LH)
18     Left DI controlmodule
19     Diagnostic module (OBD II)
20     PSE controlmodule
21     CF controlmodule
22     -
23     ATA controlmodule
24     -
25     -
26     -
27     -
28     Ultrasonic PTS controlmodule
29     -
30     SRS controlmodule
31     RCL control module
32     -
33     -
34     -
35     Headlamp range adjustment controlmodule
36     -
37     -
38     -