I have a five year old 318d with a N47 engine that has suffered a cam chain failure resulting in an engine write-off. BMW have offered to cover 50% of the cost of parts which brings an £11400 estimate down to £6800plus the £472 already spent is assessing the vehicle. This essentially writes off a very nice vehicle. They will only offer £1k part exchange and only against a vehicle from the dealership. I feel that this offer is extremely miserly especially as this is a known fact with this type of power unit. Be grateful for suggestions as to where to go wth this. Thank you.