Hi I think i have same problem, parked mine for 2 weeks, all the lights on dash not turn over, read this thread a while back and ordered a secondhand rcm, ( after trying mine in friends crossfire and same prob, unfortunately 60 miles away so couldn't bring his back to try in mine to try ) put second hand one in same prob, must add this was for a slk mercy so although identical numbers are different, put this in friends same prob so sent back,,,,, before I buy another I thought I'd share this , , I have put power direct to solonoid on starter and car turns over but not start, Does this confirm crank sensor is ok as it turned over, ,,,, my cooling fan is on full speed I've checked all fuses, and have new batttery which turns my 2.5 diesel Nissan navara over fine so not a battery issue,,, so before I order ECM is there something else I should try first,,,, any input would be great, my car is 05 roadster ( not srt)I've had it since new only covering 32000 miles. Thank you in advance. John in uk