2018 C300 with sport suspension
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2018 C300 with sport suspension
I recently purchased a 2018 c300 sedan with sport suspension. I didn't know this (I know it's stupid 
) until I have been driving for some time and noticed big shocks when I drive over bumpy road. This is more obvious when Im driving on highway. My butt almost left the seat once because of the bad road condition. So, I don't know if the sport suspension could be adjusted and softened. I called the dealer and it's just phone transfer to another transfer and wait and wait....I know it would be very expensive to replace the entire sport suspension with a regular suspension. I'm not sure what to do. The tire pressure readings are 38 38 front and 41 41 rear. My car is RWD. The pressure suggestion on the gas cap is normal load 36 and max load 39 for the front and 36 45 for the rear. I think lower the tire pressure probably would not do any help. I definitely prefer the more comfortable and smooth drive. Just want to seeking some great suggestions or any comments from you guys. Thank you very much.
) until I have been driving for some time and noticed big shocks when I drive over bumpy road. This is more obvious when Im driving on highway. My butt almost left the seat once because of the bad road condition. So, I don't know if the sport suspension could be adjusted and softened. I called the dealer and it's just phone transfer to another transfer and wait and wait....I know it would be very expensive to replace the entire sport suspension with a regular suspension. I'm not sure what to do. The tire pressure readings are 38 38 front and 41 41 rear. My car is RWD. The pressure suggestion on the gas cap is normal load 36 and max load 39 for the front and 36 45 for the rear. I think lower the tire pressure probably would not do any help. I definitely prefer the more comfortable and smooth drive. Just want to seeking some great suggestions or any comments from you guys. Thank you very much.
Last edited by gavinhuang; Sep 2, 2021 at 03:08 PM.
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it is necessary to check which equipment package the car has in the base. Based on this, it can be determined what can be up and what not. The C-Class is very light and undemanding to replace and adjust the suspension.
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Lowering the tire pressure will help cushion the ride somewhat. What size wheels and tires do you have?
I have 19" wheels and I run my tires between 32 and 34 PSI cold all around. If I bump them up to ~40 PSI cold I can feel the difference, gets noticeably harder.
I have 19" wheels and I run my tires between 32 and 34 PSI cold all around. If I bump them up to ~40 PSI cold I can feel the difference, gets noticeably harder.
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Thanks for the reply. My front is 225 /45 R18 and the rear is 245 /40 R18. It is all-season tire.
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https://www.knowyourparts.com/techni...ing-tire-wear/
If your tires are run-flats, that's most likely a big factor. If they are run-flats, I would swap to non run-flats as soon as you can:
https://www.autoweek.com/car-life/a2...and-tradeoffs/
Beyond that, if you do your own work or have the means, I would check your struts for any signs of leakage (oil seepage) and depending on your mileage, maybe consider some good replacement struts.
Last edited by Keith66; Sep 3, 2021 at 12:33 AM.
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You're welcome. I would try dropping your pressures to 36 PSI all around and see if you notice a benefit. As always, over time your tires will tell you when you have the perfect pressures for your setup:
https://www.knowyourparts.com/techni...ing-tire-wear/
If your tires are run-flats, that's most likely a big factor. If they are run-flats, I would swap to non run-flats as soon as you can:
https://www.autoweek.com/car-life/a2...and-tradeoffs/
Beyond that, if you do your own work or have the means, I would check your struts for any signs of leakage (oil seepage) and depending on your mileage, maybe consider some good replacement struts.
https://www.knowyourparts.com/techni...ing-tire-wear/
If your tires are run-flats, that's most likely a big factor. If they are run-flats, I would swap to non run-flats as soon as you can:
https://www.autoweek.com/car-life/a2...and-tradeoffs/
Beyond that, if you do your own work or have the means, I would check your struts for any signs of leakage (oil seepage) and depending on your mileage, maybe consider some good replacement struts.
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The previous owner removed the run flat into normal tires. I guess he wanted a smoother ride. So I had to buy a spare tire and look find a space in the boot to place it. 🤷🏻♂️
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If you are looking for tire opinions/recommendations, I would recommend Michelin Pilot Sport AS4 tires. Excellent tire.
Good luck!
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Great point! I need a good backup plan also. I have no spare and right now I'm relying on AAA Road Service if I ever have the need (knock wood!). I highly doubt AAA would have a 245/35/19 on their truck, lol
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Did you just put the spare tire in your trunk? I wonder how much it would take to replace all four run-flat tires to regular ones on a 2018 c300 at my local mercedes dealer.
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You dont have to replace them at the dealer any good tyre shop will do.
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I got a spare wheel called "space saver". I just placed it in my trunk.
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? Thanks: https://www.bigotires.com/tires/sku/...254518_2454018
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Thank you very much. Will definitely take a look. How about this one tho ? Thanks: https://www.bigotires.com/tires/sku/...254518_2454018
? Thanks: https://www.bigotires.com/tires/sku/...254518_2454018Dude, if those are the kind of tires you're looking at, I'm not sure what to say. Stay safe and I wish you the best on your perilous journey of discovery?
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