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KIRK343
08-07-2016, 06:42 PM
Every time I have an issue with my 03 MM I go straight to this sight and have ALWAYS gotten great advice. So I hope to get it again. My MM has 147,000 gentle miles on it. a few days ago I was leaving work and started the car up with no problem. After idli g for about 5 seconds the car just quit completely. I didn't think much about it then. It started right back up and ran like a champ. A couple days later I was pulling into my driveway and put the car in park. The car shut off on its own again and it started right back up. I noticed the clock reset to 12:00 and my stereo reset as well. As if the battery had been disconnected. Now today, on a routine trip, I noticed the car seemed to pause and jerk while going approximately 40 mph. It cleared itself out. However later on the trip, at a stop light the car acted as if the tranny was slipping. After parking and coming back 45 minutes later the car ran like a champ again all the way home. Any ideas??
fastblackmerc
08-07-2016, 07:07 PM
Have the battery and charging system checked out. Also make sure all the grounds and positive connections are clean and tight.
camelgrundle
08-07-2016, 07:33 PM
^^^ this.... Wiring or battery problem.
Turbov6Bryan
08-07-2016, 07:56 PM
Lift the red rubber water collector off the positive cable

See any corrosion there?
Gryphonzus
08-08-2016, 05:42 AM
Agree on the above. Loose or dirty ground cables cause a lot of problems. Been there done that.
KIRK343
08-08-2016, 07:27 AM
Thanks guys. I'll check the connections.

Any ideas on the "tranny issue"?
I drove it to work this morning and it ran like a champ. ???
fastblackmerc
08-08-2016, 07:47 AM
Have the battery and charging system checked out. Also make sure all the grounds and positive connections are clean and tight.


^^^ this.... Wiring or battery problem.


Thanks guys. I'll check the connections.

Any ideas on the "tranny issue"?
I drove it to work this morning and it ran like a champ. ???

Might be fixed when the other issues are fixed.
ctrlraven
08-08-2016, 08:53 AM
Modern day vehicles are very voltage sensitive, so a weak battery/low charge alternator or something else with the wiring/electrical system can cause a waterfall effect on systems in the vehicle.