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ravicchio Date registered: Dec 1899 Location: Vehicle(s): | GL450 Suspension I just purchased a (used) 2007 GL 450 and love it except it has a sloppy and loose drive. I know it's a SUV but it still feels very loose for the reviews it received. My car has 18" tires....not sure if 19" would make much of a difference. People say they love the way this car drives but I do not. Are there any aftermarket sway bars or suspension mods for the GL450? Does anyone else feel the same about the suspension, or am I alone on this. Thanks | ||
#90647 |
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cmitch Expert Date registered: Apr 2006 Location: Ala-Tenn Vehicle(s): 2002 ML320, 2005 S430 4Matic, 2010 F150 Super Crew Posts: 3412 ![]() | RE: GL450 Suspension I'd check for low air pressure in the tires. While opinions differ on this, it's better to run at or a little above maximum air pressure for best performance. | ||
#90659 - in reply to #90647 |
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AsianML Date registered: Dec 1899 Location: Vehicle(s): | Re: GL450 Suspension What suspension setting do you have it in? | ||
#90664 - in reply to #90659 |
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Marsden Classic MB Date registered: Apr 2006 Location: Capital City USA Vehicle(s): Mercedes-Benz ![]() | RE: GL450 Suspension
He means at or a little above rated air pressure (info supplied by MB in your owner's manual, door jambs and/or fuel filler cap)
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#90670 - in reply to #90659 |
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cmitch Expert Date registered: Apr 2006 Location: Ala-Tenn Vehicle(s): 2002 ML320, 2005 S430 4Matic, 2010 F150 Super Crew Posts: 3412 ![]() | RE: GL450 Suspension Marsden - 10/1/2007 7:08 PM
He means at or a little above rated air pressure (info supplied by MB in your owner's manual, door jambs and/or fuel filler cap)
Thanks!! | ||
#90678 - in reply to #90670 |
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Marsden Classic MB Date registered: Apr 2006 Location: Capital City USA Vehicle(s): Mercedes-Benz ![]() | RE: GL450 Suspension Not to belabor the point unnecessarily, but I think you're near the danger zone. Because actual pressures when hot (after highway driving for instance) are roughly 3psi higher than cold. So your 42+3=45 => excess of rated max.
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#90707 - in reply to #90647 |
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cmitch Expert Date registered: Apr 2006 Location: Ala-Tenn Vehicle(s): 2002 ML320, 2005 S430 4Matic, 2010 F150 Super Crew Posts: 3412 ![]() | RE: GL450 Suspension Marsden - 10/2/2007 1:17 AM Not to belabor the point unnecessarily, but I think you're near the danger zone. Because actual pressures when hot (after highway driving for instance) are roughly 3psi higher than cold. So your 42+3=45 => excess of rated max.
Wide tires are rated substantially lower than narrower ones. What are your tire's width? Are they regular width sedan tires or wider sport tires? As I pointed out, no tire manufacturer is going to put the actual maximum PSI on the sidewall because of liability issues. If they put 55 to 60 PSI on a tire rated for 44, what would happen if they manufactured a defective tire? They're going to lleave themselves some margin of error. | ||
#90728 - in reply to #90707 |
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AsianML Date registered: Dec 1899 Location: Vehicle(s): | Re: GL450 Suspension Isn't it also the "thinner" the tire the higher the PSI? | ||
#90768 - in reply to #90647 |
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cmitch Expert Date registered: Apr 2006 Location: Ala-Tenn Vehicle(s): 2002 ML320, 2005 S430 4Matic, 2010 F150 Super Crew Posts: 3412 ![]() | Re: GL450 Suspension AsianML - 10/2/2007 3:32 PM Isn't it also the "thinner" the tire the higher the PSI? You're making my head hurt! | ||
#90778 - in reply to #90768 |
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Marsden Classic MB Date registered: Apr 2006 Location: Capital City USA Vehicle(s): Mercedes-Benz ![]() | RE: GL450 Suspension cmitch - 10/2/2007 9:36 AM Marsden - 10/2/2007 1:17 AM Not to belabor the point unnecessarily, but I think you're near the danger zone. Because actual pressures when hot (after highway driving for instance) are roughly 3psi higher than cold. So your 42+3=45 => excess of rated max.
Wide tires are rated substantially lower than narrower ones. What are your tire's width? Are they regular width sedan tires or wider sport tires? As I pointed out, no tire manufacturer is going to put the actual maximum PSI on the sidewall because of liability issues. If they put 55 to 60 PSI on a tire rated for 44, what would happen if they manufactured a defective tire? They're going to lleave themselves some margin of error. Yeah I see what you're saying; I just wouldn't want to play with fire. Anyway, my tires on the CL are 235/55ZR17.
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#90811 - in reply to #90728 |
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AsianML Date registered: Dec 1899 Location: Vehicle(s): | RE: GL450 Suspension Marsden - 10/2/2007 11:40 PM For each 10 degree drop in temperature, the tires will lose about 1 (I heard 2 on from some other sites) PSI. So the ML at the 39-40 PSI we keep it at in the summer will drop to about 30-32 PSI in the winter. If you've ever looked at a very underinflated tire, it;s also wider because a small portion of the sidewall pretty much becomes part of the contact patch now, and you don't want wider in the snow.cmitch - 10/2/2007 9:36 AM Marsden - 10/2/2007 1:17 AM Not to belabor the point unnecessarily, but I think you're near the danger zone. Because actual pressures when hot (after highway driving for instance) are roughly 3psi higher than cold. So your 42+3=45 => excess of rated max.
Wide tires are rated substantially lower than narrower ones. What are your tire's width? Are they regular width sedan tires or wider sport tires? As I pointed out, no tire manufacturer is going to put the actual maximum PSI on the sidewall because of liability issues. If they put 55 to 60 PSI on a tire rated for 44, what would happen if they manufactured a defective tire? They're going to lleave themselves some margin of error. Yeah I see what you're saying; I just wouldn't want to play with fire. Anyway, my tires on the CL are 235/55ZR17.
Edited by AsianML 10/3/2007 7:06 AM | ||
#90839 - in reply to #90811 |
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