Hi I had the same problem with my yellow colour concept when I bought it. I changed the relay unit myself which cost me £12.42 in total from VW. The part number is V165 906 381. This put a stop to my car ever stalling again I couldnt believe it. I thought it would cost me a fortune to have it sorted out but nope thats all it took. Think I read it on here somewhere. Hope this helps. Gwen