Window switch puzzle (driver's).

I had assumed that all 45s are supposed to have 'normal' driver's window operation, as well as one-touch mode, on the door switch. Mine is all-or-nothing. I guessed at first that this was due to a fault in the switch or the window ECU, but then noticed that all the s/h switches I'd seen on eBay said "AUTO" on them whereas mine looked identical to the passenger switch, so I thought maybe someone had fitted the wrong type.



I bought an "AUTO" switch off eBay, and this morning took off the door-card thinking that the fix would be a simple changeover. My first picture shows my 'old' switch. It has a 5-way connector, only 3 contacts being used, window up, down (operates 'one-touch'), and the pole of the switch. The wires are coloured black/yellow, blue/green, and white/black and go into the loom down a tube, but apparently reappear to plug into the ECU along with a 4th, black, wire, on a 6-way connector which has 5 pins, one not being used. This is the old switch:







The 'new' switch also has a 5-way connector (4 used), but the connectors are NOT compatible. The wires are white/yellow (the pole of the switch), black/yellow (up), black/green (normal down), and blue/green (full down). These colours match the circuit diagram.







There is no black/green wire in my door, so no 'normal' down. The picture shows my wiring:







What would I need to get the dual-mode switch working? Do I just need the 4-wire section between the ECU and the switch, or if this is too involved with the loom, just the connectors to wire up myself? I'm wondering though if I have the correct ECU and motor. This is the label on the ECU:







The wiring diagram shows another four connections, going to the motor from the ECU on a 4-way connector, two of them to the motor itself, and two to something not described, but which could be an overload cut-out to switch off the motor when the glass is at its limits. My ECU has the 4-way connector, but there are only two connections in it, with two wires to the motor, red and blue. Since the motor does in fact shut off properly, I'm wondering if there are maybe two types of motor, one with a separate cutout, and one with it built-in?



I can't see any indication that anything has been modified, so would it have been always like this, and why?

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