Sevan did my pre-sale check five years ago on my ML 350 Bluetec Diesel. The car has done great for five years and 100k miles. I took it back to look things over in general and find the cause of a minor oil leak. They still knew me and remembered the car from five years ago. They found the leak, did the checks, oil change etc all for one third the prices at the dealers. The best thing I can say about them is they are Good and they are Trustworthy.