E-Class (W211) 2003-2009

Tire pressure

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Old Aug 9, 2008 | 11:40 AM
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bchenier535's Avatar
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2003 E500
Tire pressure

Why is recommended tire pressure lower on front tires? 26psi on fronts, 32psi on rears. What happens if you run 32psi on all four?
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Old Aug 9, 2008 | 11:48 AM
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magnus203's Avatar
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Nothing, you will just wear the front tyres out quicker than normal.
The front tyre pressures are lower because they take more of the weight from the engine being at the front, and being the steered wheels also. Thus lower pressure allows more "give" on cornering.
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Old Aug 9, 2008 | 03:34 PM
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nantucketsleigh's Avatar
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1992 500E, 2006 E500, 2007 GL 450
IMO manufacurers' recommended higher rear tire pressure is intended to reduce oversteer and promote understeer. The belief is that understeer is a bit safer setting for less skilled drivers. I run 35 lbs all around which, in my case seems to give the most neutral handling and best tire wear.
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Old Aug 10, 2008 | 06:08 AM
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Untertürkheim's Avatar
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There should also be a setting for high speed driving, I always run this pressure for better handling and fuel economy.
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Old Aug 10, 2008 | 03:07 PM
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03 E500 and Corvette
Originally Posted by bchenier535
Why is recommended tire pressure lower on front tires? 26psi on fronts, 32psi on rears. What happens if you run 32psi on all four?
I run 33 on all 4 Michelins and even tire wear great driving. At the lower pressures we had tire cupping on the edges when using other brands of tires.
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