C450 AMG Sport discussion only.
). So, I'm sure you'll dig it. BTW, I get a lot of comments on the interior.Anybody know if there is a break in period on these? In the process of looking through the forum but i appreciate any help
I believe the manual states roughly 1500 kms.
I'd say drive it like you're gonna drive it and enjoy. If you want to give 'er a bit just make sure all the temps are up to operating range.
I went ahead and did a 300 mile break in on mine. A very purposeful driven 300 miles, not just freeway cruising.
The Best of Mercedes & AMG
Basically, what this guy said:
You should be fine with all-seasons, yes. But the way I look at it, you're going to be putting ~36,000 miles on the car right? You could get a decent set of all seasons that last you that long, then put the run-flats back on for turn in.
OR
Spend a little more and have some dedicated snow and performance tires that you switch over. You'll have peace of mind that they will last you the entirety of the lease even with hard driving, and you'll be able to truly push and trust your car in the conditions specific for each set of tires.
Just my $0.02
You should be fine with all-seasons, yes. But the way I look at it, you're going to be putting ~36,000 miles on the car right? You could get a decent set of all seasons that last you that long, then put the run-flats back on for turn in.
OR
Spend a little more and have some dedicated snow and performance tires that you switch over. You'll have peace of mind that they will last you the entirety of the lease even with hard driving, and you'll be able to truly push and trust your car in the conditions specific for each set of tires.
Just my $0.02

I would shelf those tires ASAP. I've heard nothing but horror stories of them only lasting ~10,000 miles before needing replaced. And they are NOT cheap tires.
Shelf them and save yourself some money in the long run by getting 2 good sets of tires. You have to turn the car in with run flats that are in good shape. So if you're going to spend the money on tires anyway, might as well be great tires.
Last edited by asc; Dec 27, 2016 at 11:41 AM.
I just swapped out the stock Contis for Pilot AS 3+. So far the AS3+ have performed well in rain, slush, and light ice and snow. They are not winter tires though. They will work in areas that get occasional winter snow if you drive carefully. They are Y speed rated but I have not been able to test them on the twisties just yet.
The Contis OTOH were horrible on snow and ice. No traction at all. They are living in the garage until next spring.
BTW, I am running on the 19'' rims.
Keep us posted how they do in the twisties.
I want to take off the Pirelli runflats and put either AS3+ or possibly even MPSS. If the AS3+ work well in reasonable performance situations they are probably better for me as they should last quite a bit longer than an MPSS.
Last edited by asc; Dec 28, 2016 at 12:43 PM.
I understand the reasoning to have your car warm up at idle for 10 minutes and have it warm and ready for you to jump it, but grow a pair man. Seriously, I expect this from my girlfriend, but that is ridiculous coming from a guy.
If you drive the car with a little load on it for just a couple blocks, you'll warm the engine up just as fast as idling for 5 minutes and 5 years from now, the engine will still hold great compression.
But I'm guessing people like you don't really care about "5 years down the line" since you're lease will be up and you'll be on to screwing up your next lease...
The M 276 engine has a very very precise fuel injection system. When fuel is injected into the cylinders to be burned, it is already atomized into a fine mist that burns completely and very efficiently. There are many sensors that monitor the combustion process to ensure complete fuel burn and will adjust many parameters of the quantity of fuel injected as needed. This process happens many times per second. The spark plugs are also pulsed multiple times a second and are adjusted as frequently as needed. No excess fuel will ever be ".....sent into a cold catalytic converter", or "....washed down the cylinder walls", or "....mixed into the crankcase oil." ever...period.
Allowing your vehicle to warm up for an hour a day, every day, for it's life will have absolutely no detriment to any of these systems...period.
Passing off this type of information as being accurate for Mercedes' engines in this decade is scary... please refrain from doing this without a working knowledge of the systems.
The M 276 engine has a very very precise fuel injection system. When fuel is injected into the cylinders to be burned, it is already atomized into a fine mist that burns completely and very efficiently. There are many sensors that monitor the combustion process to ensure complete fuel burn and will adjust many parameters of the quantity of fuel injected as needed. This process happens many times per second. The spark plugs are also pulsed multiple times a second and are adjusted as frequently as needed. No excess fuel will ever be ".....sent into a cold catalytic converter", or "....washed down the cylinder walls", or "....mixed into the crankcase oil." ever...period.
Allowing your vehicle to warm up for an hour a day, every day, for it's life will have absolutely no detriment to any of these systems...period.
Passing off this type of information as being accurate for Mercedes' engines in this decade is scary... please refrain from doing this without a working knowledge of the systems.
Dude, my information is correct. These types of problems may not be as prevalent as they were 10-20 years ago, but they are still prevalent. MB didn't some how magically start defying physics just because they are a premium luxury brand that you jerk off too nightly.
Furthermore, you're last line is just hilarious to me. I do understand the ICE thoroughly in and out. If I was in fact wrong and what I was saying was misinformation, it would certainly not be "Scary" and something you should take so personal. You really need to not fly off the handle so easily.
Further furthermore, I will advise you to watch the video I posted. Having never met you, I know for a fact that the person in the video is at least twice and smart as you. Which wouldn't say a whole lot in of itself, but he agrees with my points, so he's obviously at or close to a genius level.








