Over the last few years I have noticed your comments on the intractability of Mercedes dealerships and poor customer service levels. I committed an error by putting petrol into my new diesel Mercedes. I duly broke down and telephoned Mercedes customer service who told me I was covered under their warranty. I was further told that my car would be collected and taken to a vehicle compound overnight, delivered to the main dealer the following morning and would be ready for collection at close of business that day. Based on this advice I spent that night in a hotel in London. Needless to say, none of this happened. The car was ready for collection five days later and they denied having told me I was covered under the warranty, despite having a witness to the conversations with their customer service. Consequently, I had to pay for all the services I had utilised in order for my car to be released. I gave up trying to claim recompense after a number of letter and telephone calls to their customer service and the Heads of Mercedes UK and Europe without response. Instead I have embarked on an exercise of "don't get annoyed get even." I have persuaded twenty-seven Mercedes owners to change to other providers and nine that were thinking of buying Mercedes. When I have converted fifty people I will then send Mercedes their names and car details. This will coincide in two years time with me changing my and my wife's Mercedes for another brand. Only then will I have total self-satisfaction.