Nice try Rob.As you rightly point out,this type of thing casts a shadow over all other Which reports.The public perceive them as a proffesional organisation and will presume they get their facts right.Servicing a modern car is a complex business as we all know.I often have do deal with customer queries over this type of thing.I don't expect customers to understand all the details but will explain if they want to know.Why did Which not give the garage the oppertunity to explain thier actions.If this was done Which could have verified the explanation.