make of these what you can, cant remember where i got them, may not be correct, but hope helps
DDE1
1 rpm transmitter
2 temperature sensor - fuel
3 temperature sensor - engine coolant
4 pedal position transmitter
5 boost pressure sensor
6 throttle position potentiometer
7 boost pressure regulator
8 air mass position
10 speed regulator
11 compute coupling
12 temperature sensor - air
13 rpm data line
14 start of injection
15 exhaust gas recirculation
16 start of injection regulator
17 brake test switch
36 water level sensor
DDE2
0 undefined fault
1 air mass sensor
3 electronic turn off unit
5 start of injection transmitter
6 glow period regulator
10 start of injection regulator
15 voltage supply DDE control unit
20 speed regulator
21 throttle position potentiometer
28 clutch switch
29 speed signal
31 brake switch
35 temperature sensor - fuel
36 water in fuel sensor
37 pedal position transmitter
41 glow period regulator
45 theft protection system
47 rpm transmitter
52 temperature sensor - charge air
53 temperature sensor - engine coolant
54 boost pressure sensor
56 internal control unit fault
58 disturbance of high level stage
59 deviation of boost pressure
Iain
1993 BMW 525 TDS SE 150K 2.5 Turbo Diesel, performance air filter, lowered sports suspension 30mm, full stainless decat exhaust, boot-lid spoiler, OBC retrofit, E60 Trapezoid alloys