Hi, my ML430 has started stalling while I am at lights. It has happened 5 times

poss throttle body issues seek diag and est

have technician diagnose

loose connection or failing sensor,get a diagnostic scan.

This is not an easy fault to diagnose remotely. I would measure the 12v from the battery into the fuse box and see where it goes, if you have a fine probe you can measure the voltage on the various fuses and see if you can isolate the problem to a cable (if you are lucky) or the AAM if you are not.