BenzWorld Senior Member
Date registered: Jul 2003
Vehicle: 89 420 SEL (sold), 01ML320 (sold), 03 S430 4MATIC, 06 ML500
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RE: tire pressure
Wow that's quite high. I would put whatever it says on the gas cap. Those readings are for regular driving. If you intend to speed above 160 kph for extended periods of time then raise it to max. As for the front keep it a little lower than the back other wise the steering will feel like its wondering all over the road. Most Benzes have a lower setting in the front to make it more stable, and the weight bias does not change to much. As for the back it's higher to allow for passengers, fuel, and luggage and most importantly rearward weight transfer when you floor it.
So in summary, the reading inside the gas cap is a compromise for comfort, load, and handling.