18" tyre pressure - Benzworld.org

amolak · 06-26-2004, 12:22 PM

Hi,
I have put 255 /45 /18" tyres on my car.
Pls can you tell me the correct tyre pressure in PSI, for 1-2 passengers.

Thanks

Amo
1998 S280 W140 UK

Merc600sec · 06-27-2004, 05:04 AM

same as it says in the manual

Rainmaker · 06-27-2004, 03:19 PM

Hi Amo,

I have the same tires in the front 255/45/18. I have 275/40/18 in the rear. The manual didn't give me a pressure for the 18" size. I have them set to 40psi on all four. I know its a bit on the high side, but I did it in an effort to reduce my fuel consumption. Here in the US the roads are very smooth and wide, and most of the driving is on 12 lane highways anyways, so I don't notice any difference in hardness. A more conservative tire pressure would probably be around 36-37 psi...

Cheers,
Rainmaker