My Sister's 2000 SL500 will start and run for awhile (maybe 10-15 miles), then suddenly dies and will not crank until it sits for several hours .
I have over 40 years experience with just about every Make and Model out there, except for MBZ. I am semi-retired and do not have a Scan Tool to access codes from the OBDII ... Any suggestions for troubleshooting this problem ... Starter Relay ?? ... Auto-Shutdown Relay ?? ...