I've got them on my car but the hand book only gives pressures for the 18 inch wheels. Anyone know?
thanks

I've got the 19" AMG 5-spoke wheels on my '08. If those are the wheels you're referring to, the decal in the door jam calls for 35 psi front/36 psi rear.

I have the same setup on my SL55. I have the Michelin PS2`s
My rear tires are a little bit larger than OEM and are 295`s. OEM SL65 Wheels.

I keep 40 Rear and 36 Front. Otherwise it suffers from tire wall flex at high
torque if you get heavy footed. Better to over inflate a bit than under inflate. Especially if you make any high speed runs on occasion.

i put 38 front and 40 rear

I have those wheels and run 38F/40R

Guys, what about for a 20" setup (20x9.5 front, and 20x11 rear)(255/30/20 front, 285/30/20 rear)? What PSI should I be running? Sorry to hijack your post Alastairm.