colt45

Hi
I also have a 98 C43.

I am running the same tires- Eagle F1s (factory sized front and rear, 17 factory rims) @ 35psi- that is plenty high in pressure, don't go higher than about 2.2-2.4 bar unless you have the car loaded with people.

My car is very stable at high speeds, no wander, no drift- even on rough roads. If anything it gets better, the faster it goes (this is bad for my drivers liscense )

The other guys have given you some good pointers- don't run the pressure too high, keep an eye on the rotors for warping. Good idea to make sure replacement brake pads are properly bedded.
Proper alignment makes a big difference for stability, handling and tire wear.
Also, as the car ages (my C43 has pretty low miles) suspension components will wear- good idea to stay on top of shocks, springs and bushings, not to metion ball joints and the steering idler.

Cheers
Steve

ProjectC55

+1+1+1
Don't keep telling him if he does not want to listen. Let him wreck I'm sorry to say.
When good advice is given to some of these guys they insist on not listening to wise counsel.

KJI3jflarryfe93

Hey Steve.
My car is a lowmilage too, only 88,000 km so i think the suspension and the other things are still ok, i never hear any clunking from speed bumps and potholes.

so for the other guys on this forum i do understand what you talk about, when it comes to tyre pressure regarding the size of the tyre, here i can only try the diffrences in tyre pressure to see whats the best for the car.
higher load demands higher tyre pressure/ lower load gets normal tyre pressure.
the reason i was askin about the instability is to know if any of you guys experianced the same thing, i guess it was a little high when i put in 3,2 bar and yes it was kinda bouncy and no the tyre wear was still normal as it should be, the wear comes across the whole tread as the tyre is designed to be.
some people do recomend a tad higher tyre pressure, this way you get less tyre wear and a little bit more range for your hard earned dollars when pumping gas.

Also i forgot to add, the roads in sweden are terrible with potholes and speedbumps, having a stiff car with low profile wide tyres and a lowerd suspension there will be some annoying sound, getting a comfortable ride with 40 front profile/35 rear profile will never happen, the only way is to lower the tyre pressure.

cheers

RBYCC

'Higher load demands higher tyre pressure...."


You really are clueless when it comes to comprehension of what that means.

Load = additional weight you are carrying in the vehicle...i.e three additional passengers or a trunk full of lead billets....

How many times do you have to be told that it's the high pressure that is causing your instability....and yes, eventually you will see abnormal tyre wear...

KJI3jflarryfe93

sorry for my bad engliouuuuuuuuuuush.
'Higher load demands higher tyre pressure= this says on the gasflap label and is only for 17 inch tyres there is nothing for 18 inch on the label
extra load meaning more passengers / luggage inflate tyres
the other way means normal tyre pressure normal load

Also i've been test drivin with less air pressure for 10 days, of course it felt better
from 3,2 bar to 2,9 bar feels better and it's a more comfortable ride.
I don't want to high and not too low, testing is the only way to get it right

ProjectC55

Set it for 2.5bar and LEAVE IT! This is the answer to you inquiry! 2.5bar and LEAVE IT!!!!!

KJI3jflarryfe93

so my car is now in hybernate, it will rest ther until next year when i take it out.
as for the tyres i found that a little lower deflating gives me a more of a enjoyable ride wuth less ratling in the car.

Mercedes22

It's like pulling teeth

KJI3jflarryfe93

AS always you fellow guys know the best.
it was really hard for me to believe that my tyres only needed cirka 2,4 to 2,5 bar, so i testdrove my car and it was ok.
i also called the swedish good year dealer, guess what he said the same thing i don't need more than 2,4 to 2,5. i got a liitle troubled here, i told him the tyre dude who put my new tyres to my new wheels inflated them to 3 bar,
well the response from G.Y. people was that tyre shops likes to inflate to much and jipp the customers, getting their tyres worn faster and then having them to buy new ones again, so i only drove my car with 3,2 bars during 2 summer seasons, luckily not any longtrips i drove cirka 13,0000km, so no uneven tyre wear luckily.

Good year people told me to also do a new wheel aligntment for the new 18 inch wheels for best performance.
how many people does this when they change their wheels to a diffrent size?

So i apologize very much to the helpful forum members for being a donkey
and the guy who wanted me to crash my car, no need being rude paaaaaaaal.
no-one knows everything, luckily there are forums to ask for information.

Mercedes22

KJI3jflarryfe93

thanx bro

c55m8o

With stock suspension, a resounding Yes, especially if you're cresting a small hill and the road turns at the same time when well over 100mph. ...don't run the stock setup. edit: And lower your tire pressure from where you said you run it. re-edit: ok, i read the bottom of this thread and see you finally listened; never mind.

steve s

doesn't the fuel flap also indicate/recommend what pressures should be on the tire? somewhere 32psi single driver.. 36/41 for max load iirc.. even if it's 18, it should be too far from it. anway... we have nothing to sell u. that tire dude does. glad u got it all settled now.

stiff? i would not call a w202 amg stiff, even lowered... at least it's acceptable. being in sweden, u should know how stiff and harsh a 94-97 850 feels :P. on the flip side, just be careful u don't run too low a tire pressure that it would not protect those precious rims from those nasty potholes.