Freightwhiner and Intertrashinal are my least favorites.

LOL sorry I'm just now reading this. Let me answer your 1st question.

I still have no idea what the circle with the X through it button was supposed to do (differential lock, maybe?),
It is the engine shut down override. If your buzzer comes on with the red light on the dash if you hold that switch down it will override the auto shutdown for 30sec. to get the truck off to the side of the road etc.

I been around peterbilts, IHs and Macks. out of them all i love my macks. They are good strong trucks. Yes they have went down hill alittle since volvo bought them out. But overall i still think they are a great truck. Your right to each their own i guess. But when it comes to straight trucks Mack is the #1 seller.

BTW since 2003 all Mack cabs are the same on the inside. So the CV, CH,CL etc all use the same cabs. Just different hoods.

2010 Volvo leaks everywhere but only when it rains.
Needs more pull going up and more jake coming down.

that has been passed on to macks by volvo as well ,mack a budget version of a not very good volvo ,pure bred american only way to go.

Well, as of now, y'all are the only others I've known to use that term. I never had the battery problem, but both the Detroit's alternator and the Carrier APU's alternator worked fine. I also didn't have the bolt issue (but then again, bolts don't tend to back that far off in 4 days).
As for the Volvo, one of the Ruan drivers here at DG has had that problem in his Volvo with a D13. Then again, my Cat C-15 has had a Check Engine light on since I got it a year ago. So far, it's performed just like it should.

After spending plenty of days with my foot to the floor, begging to crack 45mph before I have to get into the left lanes and join I-96 westbound, I can't approve this message. Don't even get me started on the constant regen problems, the uncomfortable seats, or the fact that I damned near get tossed out of my seat every time I hit a bump.

That bulldog on the hood is pretty cool though.

The diff lock is a picture of a pair of axles with an X in the middle.

Our trucks shut down after idling for three minutes or so. When the 'idle shutdown' warning comes on, a light appears on the dash with that circle-X crap. We have to step on the gas for a second to keep the truck running. Our day cabs don't have that circle-X button, but we have a couple of sleeper cabs for overnight runs. When the idle shutdown warning comes on in one of those, we can prevent it by pressing that button. I assume we're talking about the same button here (sort of a circular arrow with an X through it). I'm fairly confident that we are talking about the same POS trucks. 2010 models we drive. Low mileage. Well maintained. Absolute garbage.

I don't like Fargo and Dempster because of the design and performance as well.

Any trucks that's not aerodynamic belongs in the Stone Age. Unless you're a company driver and you don't give a darn about your fuel expense, choose a truck with low aero resistance. I am now pretty happy with my paid-for 2004 International 9400. It has lots of power due to the dyno-tuned CAT C15 (550 HP) and I now drive ver-r-r-y slow, thanks to the new 3.58 axle ratio.

I get less then 5MPG and make out just fine. If you have to have an aero truck to make money then you are doing something F-ed up.

I would rather have a large car and loss alittle bit of MPG then ever buy an aero truck.