I feel for you man, sounds like dire straits. What I would do is look in the phone book for a PRIVATE Mercedes Benz certified service shop, or worst case a benz dealer (though they will probably refuse to help you). A certified Mercedes technician will certainly know more about the engine than will Chrysler mechanics. Or another approach is to call a Mercedes dealer pretending you have an "SLK" and explain your problem... see what they say. The engine is identical and so are the electrical. GOOD LUCK!