My 2011 Lotus Evora S has been in the main dealer now for over 11 months to fix a poor running problem. They have misdiagnosed the fault several times and the bill has now grown to £5000. The dealer now believes that the fault is due to a faulty wiring loom. Lotus have refused to offer any goodwill contribution, despite the car having a full main dealer service history and only 20,000 miles on the clock. The car was 6 months out of warranty when given to the dealership. When responding, the garage are evasive and generally fail to inspire confidence. They have blamed much of the delay on internal problems at Lotus, but I am stuck in the middle not knowing who exactly is at fault and who I should blame. I am also unsure as to any options that I have in reducing my costs and whether I can claim against the garage for depreciation.