Start Error-W.S.P. unit?

im absolutely gutted, i have a mercedes sprinter 311 cdi, 2004, battery went dead and then "start error" on the dash, rang mercedes £177 call out and told it was W.S.P. unit, looked on the internet and sent ecu and wsp away but unable to do anything as it was wiped clean. Rang a guy on here "williamsdiesels.com" Dean, and he told me without asking any details it was a wsp (wasted £177), i saw a unit and ecu on ebay £200 and asked him what he thought to code it all in, Dean told me it didnt need coding in and that should the ecu or wsp be faulty i could be looking at a further recover and off the road time, im a builder, fitted it regardless...... Guess what.... i broke down. I had to order a wsp £168, and Dean came out to me and programmed it in. Wasnt keen to pay his price first time, but boy do i regret it now. Sent the ecu back and guess what also, address unknown.
Cost me a fortune all il say is if you get start error on your merc cheap isnt always good. Wasted days off the road, wasted £377 and £130 on recovery, and lost a weeks worth of work, and was back to square one Needless to say Dean was laughing when he arrived. Still wouldnt drive another van, sprinters are the best.

Ally Matthews
December 2009