Don't know if this is directly related but this is an extract from honestjohn.co.uk about a common stalling problem on 110 TDIs :
"Some TD 110s had a problem of stalling while coasting to a standstill from about 15 mph in neutral. The cure was to replace the ECU, but if the car was a personal import out of its 12-month pan-Euro warranty, the owner had to pay. This problem now seems to be coming back on high mileage TDI 110s. VAG acknowledges a fault with the ECU (038 906 018 BM) and specifies an upgraded unit (038 906 018 GQ) at ?695.00 + VAT. According to VAG technical, this problem will eventually occur with all ECUs of this part number, so a second hand part may only be only a short term"
Might be worth asking the dealer about this?
Chris