ignition control module

hello all I have an E240 W210 and my key has packed up parked the car at 11.30 pm locked it at 09.30 i went out and car unlocked put key in ignition and herd the steering lock come of,but key would not turn the ignition on.so i thought i would lock and un lock it and try again. car would not...

I've been having problems with my E300-24 lately. It cuts-off soon after starting and my mechanic reckons it's the Ignition Control Module. Is there anyway of confirming this as it's a very difficult/expensive part to get hold of. If this is broken, can anyone suggest where to get one as the...