Koko tilanteen ilmeisesti aloitti jarrupolkimen sähkökytkin joka ei toiminut. Ruutuun pölähti että jalan pitää olla polkimella aina kun yritin vapauttaa käkkäriä, jalka tietysti jarrulla.
Löysin jonkinlaisen reset -ohjeen fransmannikaarafoorumilta ja ajattelin kokeilla kunhan saan sen kytkimen vaihdettua:
This next bit is to reset it:
To re-engage the electric parking brake (once the malfunction or the flat battery has been resolved):
12) make a long pull on the control lever A (electronic parking brake lever) until the parking brake warning lamp (!) flashes on the instrument panel
13) then make a second long pull until this warning lamp remains lit permanently.
The time for applying the brake subsequent to the emergency unlocking will be longer.
Warning - don't turn the ignition on until you have completed steps 12 and 13 above or you will damage it!
This procedure may be required before the BSI / various ECUs will reset regardless of Diagbox. It might be worth a shot.
The info above is available from the handbook on pages 78 & 79 - but I have extracted some elements in case you don't have time
http://info.citroen.co.uk/assets/micros ... ndbook.pdf