OMG, tires.
So I go check the service manual looking for the oil weight and notice there *IS* a mandatory LSD fluid change at 2k miles, even though they originally told me there wasn't. 
I schedule a visit and ask them to check the oil while they're at it. They call back as I'm on the way to pick it up and ask if they can keep it an extra day as there's a TSB to replace the oil level indicator. No problem, I'll give my wife the loaner and drive her Odyssey for a day.
So I get there and as we're signing the release for the loaner the tech happens to mention
"Have you seen your tires?"
<blank stare> "Um, no, why?"
"The rear tires are bald."
<blank stare> "Uh, that's impossible, I only have 3500 miles on the car."
"Yeah, you should take a look at them."
"He is always sliding it all over the place." (the wife)

Honestly, I don't really "slide it all over the place" but sure enough, we come to pick the car up and the rears are mostly gone.
So now I'm looking for replacements.What is everyone else's experience with tire wear? I'll admit I do put ESC into sport every so often, but I don't do burnouts, I don't do track days, and this is less than half the mileage I got out of my 911 which is a notorious tire eater. On another forum I read, everyone swears it is either a) overinflation or b) camber (not enough negative camber). I checked the pressure and they're okay - in fact, I keep having to add air to the left rear.
So I'm a little bummed about the prospect of replacing tires 2x/year and wondering if I should swap the P Zero's for some ContiSportContact3 with a higher treadwear rating. I want some grip since the car is very tail happy anyhow, so I'm not real thrilled about the idea of the Contis over the Pirellis.
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F: 39/38
R: 37/42.5
North, you said you run 40R...would 2-3 lbs too much cause them to wear at double the rate? I was expecting at least 8k miles from the rear - or is that too much to expect? I've never had a car this heavy.
The Best of Mercedes & AMG
F: 39/38
R: 37/42.5
North, you said you run 40R...would 2-3 lbs too much cause them to wear at double the rate? I was expecting at least 8k miles from the rear - or is that too much to expect? I've never had a car this heavy.
Sorry for the poor iPhone picture . Its cold and raining here....
Last edited by NORTH 44 C63; Apr 1, 2009 at 11:34 AM.
Let me guess, the front tire treads look almost new.
I went through mine in about 3000 so you're right near the middle range like me. The pattern may be due to pressure, but the overall wear is the tire/torque combination. Although I did several short burnouts and one huge one so there you go.
So I go check the service manual looking for the oil weight and notice there *IS* a mandatory LSD fluid change at 2k miles, even though they originally told me there wasn't. 
I schedule a visit and ask them to check the oil while they're at it. They call back as I'm on the way to pick it up and ask if they can keep it an extra day as there's a TSB to replace the oil level indicator. No problem, I'll give my wife the loaner and drive her Odyssey for a day.
So I get there and as we're signing the release for the loaner the tech happens to mention
"Have you seen your tires?"
<blank stare> "Um, no, why?"
"The rear tires are bald."
<blank stare> "Uh, that's impossible, I only have 3500 miles on the car."
"Yeah, you should take a look at them."
"He is always sliding it all over the place." (the wife)

Honestly, I don't really "slide it all over the place" but sure enough, we come to pick the car up and the rears are mostly gone.
So now I'm looking for replacements.What is everyone else's experience with tire wear? I'll admit I do put ESC into sport every so often, but I don't do burnouts, I don't do track days, and this is less than half the mileage I got out of my 911 which is a notorious tire eater. On another forum I read, everyone swears it is either a) overinflation or b) camber (not enough negative camber). I checked the pressure and they're okay - in fact, I keep having to add air to the left rear.
So I'm a little bummed about the prospect of replacing tires 2x/year and wondering if I should swap the P Zero's for some ContiSportContact3 with a higher treadwear rating. I want some grip since the car is very tail happy anyhow, so I'm not real thrilled about the idea of the Contis over the Pirellis.
I am going to switch out the fronts with the same when when I have about 10K miles on the car and stay with the Bridgestone's.
As for traction I honestly feel the difference between the two brands and I think the Bridgestones have way better traction than the Pirelli's.
Good luck!

Phil
It seems like you definitely need to get new tires but the outer and inner edge don't look nearly as worn.
Get new tires ... I crashed my E55, in light rain, with tires like that.
My little Turbo car (not a MB) is light in the rear, very powerful and basicly is hazing the tires anytime I am on the gas enough to make boost, eats thru rear tires in as low as 2k mi but I abuse it alot.
If your typical drive involves accellerate, decellerate, accellerate over and over with little cruise miles in between then it will eat them faster. Even when you don't feel you are running hard, that car is putting some serious torque thru the rear contact patch. If you like to gas it hard, like many of us do, it just gets worse, lol. If you had 42 psi and go to 40 or 38, it may improve how even the wear is but it will still be a short life.
I cannot say how they would do on your car but my first AMG was a C36 and I had Bridgestone made Fusion tires on it and while they did not last all that long, they are half the price of comparable Bridgestone or Pirelli tires. The Fusions had outstanding wet and dry traction and low road noise. On my C32 I went with Bridgestone Re050 PP's but that was cause I was planning a track event. Having driven both, I cannot tell much if any difference between the Re050's and the Fusions. Both were way way better than the Pirellis. I think the Fusions are made in Korea and target the younger, poorer tuner market crowd with a lower price point low profile performance tire. They are quite a bargain but lack the pedigree of the Bridgestone name. I used the fusions in a couple of track events with the turbo car and they stick like race rubber once heated up. Good enough for 1st place in class in a street tuner challenge event two years ago at Mid Ohio. My only caution is that MB/AMG specifies the tires for our cars so anything else is an experiment. You pay your money and take your chances.
Irish
My little Turbo car (not a MB) is light in the rear, very powerful and basicly is hazing the tires anytime I am on the gas enough to make boost, eats thru rear tires in as low as 2k mi but I abuse it alot.
If your typical drive involves accellerate, decellerate, accellerate over and over with little cruise miles in between then it will eat them faster. Even when you don't feel you are running hard, that car is putting some serious torque thru the rear contact patch. If you like to gas it hard, like many of us do, it just gets worse, lol. If you had 42 psi and go to 40 or 38, it may improve how even the wear is but it will still be a short life.
I cannot say how they would do on your car but my first AMG was a C36 and I had Bridgestone made Fusion tires on it and while they did not last all that long, they are half the price of comparable Bridgestone or Pirelli tires. The Fusions had outstanding wet and dry traction and low road noise. On my C32 I went with Bridgestone Re050 PP's but that was cause I was planning a track event. Having driven both, I cannot tell much if any difference between the Re050's and the Fusions. Both were way way better than the Pirellis. I think the Fusions are made in Korea and target the younger, poorer tuner market crowd with a lower price point low profile performance tire. They are quite a bargain but lack the pedigree of the Bridgestone name. I used the fusions in a couple of track events with the turbo car and they stick like race rubber once heated up. Good enough for 1st place in class in a street tuner challenge event two years ago at Mid Ohio. My only caution is that MB/AMG specifies the tires for our cars so anything else is an experiment. You pay your money and take your chances.
Irish
This is not a "power" problem. its either a compound problem, a psycho driver problem, or an alignment problem.
Last edited by Quadcammer; Apr 1, 2009 at 03:10 PM.
I just got some Kuhmo's delivered to my door for $1220. I'd go with 275 for the rear.
So, if i drive the car everyday (and i average 1000-1200 miles per month), I have to budget for a new set of tires once every 3 months? Sounds excessive to me. Since I don't burnout everyday, I was able to get 40K miles on a set of Michilin PS2 (running on a M3) before i have to change the rear tires. I know there is a big torque difference but cannot be that much on wear and tear. Are these people smoking the tires each day because it is fun to do it? I also had a vette running on michilin PS2. not as good, but still get 35K-36K miles on the rear set. Anything under 10K miles sound extreme to me. maybe it is just the Pirelli PZero.

So, if i drive the car everyday (and i average 1000-1200 miles per month), I have to budget for a new set of tires once every 3 months? Sounds excessive to me. Since I don't burnout everyday, I was able to get 40K miles on a set of Michilin PS2 (running on a M3) before i have to change the rear tires. I know there is a big torque difference but cannot be that much on wear and tear. Are these people smoking the tires each day because it is fun to do it? I also had a vette running on michilin PS2. not as good, but still get 35K-36K miles on the rear set. Anything under 10K miles sound extreme to me. maybe it is just the Pirelli PZero.
Not sure the HP/torque alone explains it, although the C63 does produce more than 360 lb-ft starting at 2000 rpm - meaning compared to some cars with higher torque (but available only at high rpm) with a C63 even just daily driving without intentionally goosing the throttle you are constantly delivering huge amounts of torque.
I'm curious about that mustang with insane hp/torque - at what rpm do you start to get 360+ lb-ft?
I'm also curious to see the longest that anyone has gone on these tires on a C63. I've seen 8k I think. Never seen anything close to 15k.
So, if i drive the car everyday (and i average 1000-1200 miles per month), I have to budget for a new set of tires once every 3 months? Sounds excessive to me. Since I don't burnout everyday, I was able to get 40K miles on a set of Michilin PS2 (running on a M3) before i have to change the rear tires. I know there is a big torque difference but cannot be that much on wear and tear. Are these people smoking the tires each day because it is fun to do it? I also had a vette running on michilin PS2. not as good, but still get 35K-36K miles on the rear set. Anything under 10K miles sound extreme to me. maybe it is just the Pirelli PZero.
With Michelin PS2s I was getting around 12-15k miles. TW = around 250
With Goodyear GSD3s a bit more. TW = around 300
With Michelin PScups I was getting around 6k miles TW = 80
With MT drag radials ... I don't know yet but I bet around 3k miles. TW = 0
So far my favorites are the Michelin PScups and obviously the MTs for drag racing.
I have over 9000 miles on my original Pirelli tires and they are nowhere near the cords. Plenty of tread left! I do 90-95% freeway cruising though.
Signed,
Wuss-in-Chief



