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The first two codes are the tell tail story. When the Coolant Circulation Pump fails electrically, it shorts the wiring in the AAC Cont. Module. Stupid & costly design by Mercedes.
So to solve this issue you must replace the pump first and then the AAC Module, used, new is too expensive.
Make sure that you get the radio keys. After installing them push the keys outward and pull the radio out. Do not disconnect the radio if you do not have the code.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
