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SLK350 AMG Sport
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Discussion Starter #1
I have run-flats on my 350 (with AMG sport and 7G) and although I have not had a chance to drive it in temperatures about 32F it seems to me that the traction is low. There is not way that I could give it all the power (torque) that it has off the line. It also seems to eager to slip in a corner. Any other experiences?
 

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SLK 350
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The poor traction is pobably due to the low temperature. The owners manual says not to drive with the standard tires in temperatures below 45 F.
 

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SLK55 //AMG
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1,212 Posts
Are you still driving with the tires that came with the AMG sport package?
If so it is not surprising that you are slipping a lot.
They are performance tires and need to be "warm" in order to operate properly - hence summer tires.
In order to get superior grip in the winter, you can do what I did and get a set of winter wheels -preferably non staggered with winter tires. Mine are Blizzak LM22s and I was able to drive confidently in the snow that was dumped on us in the northeast lately.
Cheers!
 

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R171 SLK200 2005
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475 Posts
Love that last photo!!! [:D]

You just need a snow plow on the front of it!!! [8D]
 

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2005 SLK 55 AMG
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372 Posts
Run flats are dangerous without tire pressure sensors and a pressure monitor. You can have a flat but the tire doesn't look flat and you may drive too fast and the tire might destroy itself at speed.
 

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SLK350 AMG Sport
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334 Posts
Discussion Starter #8
Thanks everyone fro the info.
Yes the run-flats come with the monitor. I got my car 2/19 and was tryiing to hold out without putting snows on it this year.

I drive the SUV if things get bad.
 

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slk 350
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116 Posts
Snowball:

I also have the run flats (not my choice but they came with the car) and I’ve had exactly the same experience as you. There is a noticeable lack of traction the few times our weather has permitted me to take it out. The car skids when turning onto a major road at even moderate throttle. It also seems that the run-flats make the car noisier above ~50 mph than I remember from my LE test drives.

My previous Jag XKR had Z rated tires and had much better traction in the cold. Granted it was considerably heavier but it also had 390 ft-lb of torque. It never skidded like my SLK350, even during turns at full throttle.

I could probably live w/ the noise once the top is down, but the lack of traction is enough to make driving the car a worry rather than a grin. My MB dealer has agreed to let me do an A-B comparison w/ a demo car when (if?) the weather warms up a bit.
 

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I just switched out the run-flats in my MINI for standard tires - Z rated Eagle F1 GS-D3. Very quiet, smooth, and grippy. If anyone is looking at max performance replacements for the run-flats I recommend the Goodyear F1, Bridgestone S-03, Michelin PS2, or BFG KDW2.
 

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350 SLK
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I had stated in an early thread several months ago that I had not chosen the Run-Flats because of the noise but several posts said they were not any noisier than normal tires. Although I am not glad to hear they are noisy, I am glad I did not choose them.
 
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