Now that u have a new K40/ mercedes// RCM chrysler calls it your old RCM, don't even think of repairing it or letting your mechanic do it send it to tighed1@hotmail.com
look at post 6 he is the only one that knows the rcm better than anyone, i know of two shops that rebuild them and they fail, i bought the two and sent to TJ got them back
went to the shop they had the crossfire there ,all the wires under the hood were hanging over the finders,, I ask the mech if this was the same crossfire as 3 weeks ago he said yes i said i have a rebuilt rcm would you try it,,, the car started first time in 3 months that shop i sold them the rcm , now when they get a crossfire in they call me.
jim