Hello, at the dealer we bought a BMW520d Touring construction year 09.2007, with 116000km for 18900.-euro.After 10 months and 12700 km driven the engine is defective and must be replaced.Workshop findings:Cylinder head disassembled-through at the bridge of cylinder 2.3 and 4.The pressure in the cylinder escapes thereby into the cooling system.Such washings on the bridges could result from wrong driving.After 10 months and almost 13000km is unlikely to mean workshop. However, it is important for us to know whether this damage may have occurred after our journeys, or whether the previous owner is the basis for the wrong driving. A well-known car mechanic thinks that if the turbocharger was already defective, this can also come to these washings.Workshop must not do any research, which has already been repaired on the engine at the previous owner.Who knows about such a damage, or had already such a problem. Thanks in advance Bely