Rotorhead500
Senior Member
- Joined
- Oct 19, 2012
- Messages
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- Location
- Very South Devon
- Your Mercedes
- Used to have a C63...
Interesting thread is this. I say this because I've recently bought a 2013 SL350 and the rear tyres are supposed to have 39 psi in them as do the fronts (I think) I thought at the time that this was a bit excessive. The ride is quite firm and they are run flats, which I'm going to change to standard once they wear out. So my question is should I drop the psi and to what level. My previous car was a Jaguar S Type with 18 inch wheels and the pressure recommended was 30 psi but I used to run them about 28/29
Your thoughts please
The recommended pressures on my C63 were 44 psi when lightly loaded. I was... pretty surprised, as that was the most I'd ever seen on any road car of mine.
Suffice it to say, I tried it... it lasted one day before I went back to usual 34-35 on front and 32-33 on rears. In 4 yrs, never got uneven nor obviously premature tyre wear, just a far better ride, better steering response (at 44, it felt like I was steering on ice), and lower road noise.
I'm pretty certain the intention was purely to coax more friendly fuel consumption figures out of it