Help! My wife bought me this car six years ago for my birthday and I am slowly getting it restored back to showroom condition. It has 75,000 miles on the clock. Mercedes have worked on the mechanics and on the electrics, fitting a new ignition switch and instrument cluster. They could not carry over the last mileage because there is no facility to do so. My problem is this: If the engine is switched off, it won't immediately start again. The engine either turns over, but will not start, or it won't turn over at all. The remedy is to leave it alone for 30 mins and then it starts no problem. Mercedes have experienced this problem themselves, but cannot find anything wrong with the car and have asked me to contact this forum for advice.