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Tire Pressure??

Old 10-13-2009, 11:54 PM
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'09 C350
Tire Pressure??

Hi Guys,
This is my first Benz, C350 2009 and i'm learning slowly about all the stuff in it! but wasup with the tires? it looks flat.. and when i measure the PSI, it's 30 PSI, but it looks flat.. or am i suppose to have higher PSI?
my wheels are AMG 17''.

THANKS
Old 10-14-2009, 12:31 AM
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E.FIDDY.FIVE AMG
you should try to fill them up to 51 psi
Old 10-14-2009, 12:33 AM
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1996 MB E320 & 2010 Nissan Elgrand
Did you check the PSI information on your door?
Old 10-14-2009, 12:49 AM
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2008 C300 Sport, RWD, US
Originally Posted by B on my Benz
you should try to fill them up to 51 psi
There is one in every group.

Use the numbers provided in the driver's door sill and be sure that you measure when the car has been sitting there for at least 4 hours.

They're suppose to look like they're a bit low.
Old 10-14-2009, 01:12 AM
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'09 C350
51 PSI? i think i'll blow up my tires hahah, yeah the side of the door said 29 psi fronts and 30 back for cold weather. the information seems to be correct, but looks flat, i guess i''ll take a picture tomorrow and see what you guys think
Old 10-14-2009, 01:19 AM
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2008 C300 Sport, RWD, US
That's not cold weather. Its the PSI before you've started driving it otherwise known as the cold inflation temperature....which could be 90 degrees.
Old 10-14-2009, 06:13 AM
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Unless you run with weight in the tail all the time 30 psi all round will give best tyre wear & comfort ie 2.1 bar
Old 10-14-2009, 07:10 AM
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2008 C300 Sport, RWD, US
Originally Posted by dadangman
51 PSI? i think i'll blow up my tires hahah, yeah the side of the door said 29 psi fronts and 30 back for cold weather. the information seems to be correct, but looks flat, i guess i''ll take a picture tomorrow and see what you guys think

Mine reads 28 front and 33 rear for a 2008 C300 with the standard 17" tires which were the Michelins.

Are you running another size tire or see anything that would explain why our inflation pressures are different?
Old 10-14-2009, 09:14 AM
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2020 GLC300 4MATIC
Mine state 30 front / 35 rear with a clause of +5 if driving over 100+ mph....

So I keep mine at 34 / 39 ;-)...
Old 10-14-2009, 09:44 AM
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2008 Black Out C350 Saks Edition / 87 VW GTI
33psi F 37psi R if you have 18's
Old 10-14-2009, 10:05 AM
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Another round of ICE
Originally Posted by JimPap
Mine reads 28 front and 33 rear for a 2008 C300 with the standard 17" tires which were the Michelins.

Are you running another size tire or see anything that would explain why our inflation pressures are different?
Same info here...car came with Conti 17" staggered
Old 10-14-2009, 10:47 AM
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'08 c300 sport
Is the low tire pressure warning on?
Old 10-14-2009, 11:15 AM
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2008 C300 Sport, RWD, US
Originally Posted by EASYDOES1T
Is the low tire pressure warning on?
No.

I think that has to do with what inflation pressure was used when the tires were programmed into the tire pressure warning system. This system can be user reset as needed.
Old 10-14-2009, 12:16 PM
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'08 c300 sport
Originally Posted by JimPap
No.

I think that has to do with what inflation pressure was used when the tires were programmed into the tire pressure warning system. This system can be user reset as needed.
... Gotcha
Old 10-14-2009, 05:00 PM
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2014 Ghibli S Q4 & 2008 C350
And if you have the 18" C63 wheels, the recommended tire pressure is 41F/45R.

That surprised me a bit, because we I first upgraded my wheels/tires I filled them up just like the OE 18's for the C350. Doh!
Old 10-14-2009, 05:16 PM
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2008 W204
^ Are you sure about that? They seem too high!
Old 10-14-2009, 05:25 PM
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C 350 Obsidian Black
My '08 Germany Factory with 18" wheels reads the higher values also. In the range of the previously mentioned 33 and 37.
Old 10-14-2009, 05:58 PM
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
On our 350 the rear tyres show centre wear running anything higher than 30psi. The car does 99% of it's running 1 up.
Old 10-14-2009, 08:28 PM
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09' E350 AMG Sport, 09' C300, 03' Honda S2K
Mines says 28 front, 33 rear. I just filled it up 2 psi extra from and back. so 30 F , 35 R
Old 10-14-2009, 11:35 PM
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'08 C300 Lux Barolo Red Beige Leather P2 MM 18" wheels '84 944
Druck

Originally Posted by Star & Laurel
My '08 Germany Factory with 18" wheels reads the higher values also. In the range of the previously mentioned 33 and 37.
The TP label on the gas flap for 18s specifies 33/38 but I found that 35 in the rear softens the ride a bit. Wear across the face of the rears is even at 7.5 to 8/32 in. @ 15000 miles.

Bridgestone RE050A.
Old 10-14-2009, 11:38 PM
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'08 C300 Lux Barolo Red Beige Leather P2 MM 18" wheels '84 944
Try is the operative word here.

Originally Posted by B on my Benz
you should try to fill them up to 51 psi
Blammo!
Old 10-15-2009, 11:18 AM
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'09 C350
nice.... didn't know that hahaha, but wow guys 28 psi in front? cuz that **** looks deflated haha and mine is at 29psi. i'll try to remember taking a picture when i get off work today, but it's been raining so been lazy.

My front tires look deflated, not my back.
Spec:
17'' AMG continentals
C350 2009
Old 10-15-2009, 12:55 PM
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c300
Originally Posted by Krytech
And if you have the 18" C63 wheels, the recommended tire pressure is 41F/45R.

That surprised me a bit, because we I first upgraded my wheels/tires I filled them up just like the OE 18's for the C350. Doh!

Can anyone else confirm this? I've recently upgraded my C300 to C63 18", if this is true i'm running very low!

edit: C63 forum says 39psi all around for the tires.

Last edited by thearc; 10-15-2009 at 01:00 PM.
Old 10-16-2009, 12:10 PM
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2016 C63, 2009 C3004M
Mine says 28/33 F/R on driver's door, but 30/35 F/R on the gas tank cover and of course the +5 for going at high speed. I just take the middle and do +4 all around to get 33/38 F/R 'cause extra pressure vs high speed should relate linearly instead of one jump.

Also, correct me if I'm wrong on this, isn't tire pressure requirement dependent on the car rather than the tires themselves? Hence all tires only come with a max allowed value. Afterall, it's the systems of the car that are riding on the tires. In other words, shouldn't we just follow whatever it says on the driver's door regardless of the type of tires?
Old 10-16-2009, 12:22 PM
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2008 C300 Sport, RWD, US
coolvi

That's strange. Both my door sill and the gas cap cover read 28/33. Then below that it reads +4 for over 100mph. This is on the original 17" Michilen tires on a 2008 C300.

Yours is a 2009 C300 4matic. What else does it say around the 30/35 on the gas cap cover. Anything about extra weight?

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