I think that is a fair point.As a professional outfit I think it would have been reasonable to inform you that this job could go very wrong and expensive and advise you to make a decision as to proceed or not. I am sure this is not the first time that the garage has encountered this problem.I would stick to your guns and pay the original quote only.

Yes I refused to get the clutch fixed because they quoted me for almost £2000... I didnt have that sort of money before christmass so I said no. I gave them the green light with the glow plugs as they have found that fault and based on their starit forward advice that is going to cost me £300. The car was working as I drowe it in. So some of the glow plugs were fine.

HJ has answered this now in his Q and A section -

www.honestjohn.co.uk/askhj/answer/57542/legal-advi...e

Yes it did but dosn't help... I know now that is a delicate job to remove fused glowplug and expensive. I understand... My question was, are they correct to quote me for £300 and later ask for £2200? Have they dealt corectly by not identifiying and not informing costumer of possible outcome? In the end of the day there is not couple of houndreds difference, is £1900. I did not have a final decision to procede or not as my agreement for the job was based on £300.... I am not holding them responsible for snaping the glow plug. I am holding them responsible for failing to inform me for a possible outcome that is excruciatingly more expensive than their original quote. Thank you anyway for your feedback. Regards.

Hell, anything is, as you put it, a 'possible outcome'. They could have taken all the glow plugs out and found that the head was cracked. According to you, they should inform you that that is a possibility, no matter how remote.

As I said in my last post, HJ himself has now answered this. If you aren't happy with that advice, which has cost you nothing at all, then I suggest you go and pay for a solicitor.

"My question was, are they correct to quote me for £300 and later ask for £2200? Have they dealt corectly by not identifiying and not informing costumer of possible outcome? In the end of the day there is not couple of houndreds difference, is £1900. I did not have a final decision to procede or not as my agreement for the job was based on £300...."

Hang on - higher up you said the price had been renegotiated to £836. In your first post you said the quotation was for £300+. (That, by the way, does not sound like a quotation - more like an estimate.)

I think it would be unreasonable to balk at that. You were told it might be more than £300. You have to accept that, in the real world, it's often impossible to give a firm estimate, and I doubt very much whether a garage would ever give a written quotation in those circumstances. So I don't think you can challenge them legally.

However, I'm sure you do have a point here, though it's more a question of communication than anything else. There should have at least been a conversation along the lines of: "We think the job will cost you somewhere between £300 and £350, sir, but we need to warn you that glowplugs can sometimes be very difficult to remove, and the price could easily more than double."