Thank you for your message. For clarity, your initial diagnostic quote was $160, not $140. When I respectfully attempted to discuss the price, I found your response dismissive and unprofessional — specifically, your suggestion to "go get it checked at an authorized dealer." I took that advice, visited the Audi dealership, and had the issue resolved efficiently. While I value transparency, mutual respect during negotiations is equally important. I’ve moved forward with the solution elsewhere, but appreciate your efforts towards justification. Best regards.