[ainarssems]

If the fault was occurring when moving I would say broken conductors in ABS sensor cable but since mostly happens when stationary I am leaning towards dry solder joint in ABS unit. Sitting in traffic etc results in heat buildup under bonnet, cracked solder joint expands and looses connection, start driving or leave car alone for a while it cools down joint contracts and makes contact again. Common problem for many cars, I think I have heard it happen on several D3's before. You can remove electrical part from pump and send it off for repair or you could have a go repairing it yourself, I did it once for friends Volvo, just cut it open, re-flow all big solder joints for plugs/solenoids and glue the cover back on.