E-Class (W210) 1995-2002: E 200, E 220D, E 240, E 290TD, E 300TD, E 200, E 240, E 280, E 320, E 420, E 430 (Wagon, Touring, 4Matic)

New tires = must do alignment

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Old Aug 7, 2010 | 02:29 AM
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1999 E320 & 2008 S550 Designo
New tires = must do alignment

I know it has always been the rule to have an alignment done after getting new tires. Do you guys stick to this cardinal rule ???
My car does not pull to left or right and the wear pattern is kinda normal...I am just afraid if they touch it ...they may make it worst. The car has not had an alignment done ever.

1999 w210
83k miles
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Old Aug 7, 2010 | 03:00 AM
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What kind of tires did you get?
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Old Aug 7, 2010 | 03:57 AM
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I put Fusion HRI tires on at 65k miles, no alignment. Now at 115k I'm almost ready for another set. I'll get the same ones because I love them, and no alignment. Car tracks perfectly
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Old Aug 7, 2010 | 08:52 AM
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If it ain't broke then don't fix it.

Personally, I have never had a vehicle aligned just because I put new tires on it. Never heard of this "rule".
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Old Aug 7, 2010 | 09:38 AM
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Originally Posted by 01BlackE320
I put Fusion HRI tires on at 65k miles, no alignment. Now at 115k I'm almost ready for another set. I'll get the same ones because I love them, and no alignment. Car tracks perfectly
That is good to know about the Fusion tires. I have General tires (Continental is parent company) and very happy with the looks, performance, and wear....and they were not expensive.
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Old Aug 7, 2010 | 09:42 AM
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Originally Posted by Sathinas
If it ain't broke then don't fix it.

Personally, I have never had a vehicle aligned just because I put new tires on it. Never heard of this "rule".
Surprised you have not heard of this rule...It usually comes from the tire/alignment shop advisers....I suppose so they can squeeze more money out of consumers.
But, I am with you regarding this....don't fix what ain't broken.
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Old Aug 7, 2010 | 09:44 AM
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Originally Posted by BigBoss
What kind of tires did you get?
I am shopping for them now...got a quote for Bridgestone from Costco...there is a $70 rebate right now.
Any comments on the Bridgestone Potenza RE760 ($155/each) ???? anyone???
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Old Aug 7, 2010 | 09:47 AM
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This could very well be a real rule of thumb, it's just that in my 15+ years of driving (and 10 of those, relatively high performance vehicles), I've never heard of it. and I've never "suffered" from buying new tires and having my alignment thrown out of whack because of it.

And if a tire guy ever suggests that to me, I'll promptly ask him/her if he is out of his rabid assed mind.
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Old Aug 7, 2010 | 03:22 PM
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A close look at the tread wear patterns on your old tires will let you know if an alignment is needed or if you may have other suspension issues.
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Old Aug 7, 2010 | 05:28 PM
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You should do an alignment if you change certain suspension components because it can alter suspension geometry and (most importantly) you often have to remove the camber bolts in order to install things like springs and struts and this alone will throw off your alignment, even if you don't lower the car.

Unless the diameter difference between the tires is massive, it shouldn't affect the geometry enough to matter.
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Old Aug 7, 2010 | 08:06 PM
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Originally Posted by mistertonyn
I am shopping for them now...got a quote for Bridgestone from Costco...there is a $70 rebate right now.
Any comments on the Bridgestone Potenza RE760 ($155/each) ???? anyone???
They are a pretty new design. They were made to offer a longer lasting summer only tire, they are not all seasons but should do fine in rain. I've heard a couple of complaints about them grabbing road grooves, but overall they are a good tire for the price. They definitely perform/grip well in warm, dry conditions and would be good for some spirited driving.
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Old Aug 7, 2010 | 08:39 PM
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Originally Posted by Sathinas
If it ain't broke then don't fix it.

Personally, I have never had a vehicle aligned just because I put new tires on it. Never heard of this "rule".
Not so much a rule as a recommendation to at least get it checked.

Originally Posted by saintz
You should do an alignment if you change certain suspension components because it can alter suspension geometry and (most importantly) you often have to remove the camber bolts in order to install things like springs and struts and this alone will throw off your alignment, even if you don't lower the car.

Unless the diameter difference between the tires is massive, it shouldn't affect the geometry enough to matter.
The first factor in a vehicle's alignment is it's ride height. New tire = new ride height. Therefore it is quite common to need an alignment when installing new tires.

Like I said above, the alignment should be checked with the tire installation. It doesn't mean it is always required however.
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Old Aug 7, 2010 | 08:46 PM
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I never realized an alignment can alter the vehicle's ride height.... :/
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Old Aug 7, 2010 | 11:42 PM
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Originally Posted by Sathinas
I never realized an alignment can alter the vehicle's ride height.... :/
As mentioned, new tires can alter (generally increases) a vehicle's ride height. Also, changing camber when performing an alignment can alter the ride height.
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Old Aug 8, 2010 | 12:31 AM
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Just take it to your dealer, hopefully they have that ramp they drive it up on, and it tells you on the screen if it even needs an alignment.

My rep just drove it on the ramp and i watched and it was slightly off in the front, i just got new tires too. but for them to check it should be free, but if its off i would just get them done. But doesn't seem like you would need alignment without any uneven tire wear or anything like that. I had slight uneven wear on my front tires. i was positive camber there for some reason, the car's suppose to have a bit of neg.
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Old Aug 8, 2010 | 03:49 AM
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Originally Posted by RedG
Not so much a rule as a recommendation to at least get it checked.



The first factor in a vehicle's alignment is it's ride height. New tire = new ride height. Therefore it is quite common to need an alignment when installing new tires.

Like I said above, the alignment should be checked with the tire installation. It doesn't mean it is always required however.
Very true statement above...great insight.
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Old Aug 8, 2010 | 04:12 AM
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How much is an alignment at a dealer on average? I heard only dealers can do it on this car?
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Old Aug 8, 2010 | 10:44 AM
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If I ever have to do the alignment...

Originally Posted by BigBoss
How much is an alignment at a dealer on average? I heard only dealers can do it on this car?
I would have the dealer do it. I get coupons from local dealership that charges under $100.
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Old Aug 8, 2010 | 11:22 AM
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Originally Posted by RedG
The first factor in a vehicle's alignment is it's ride height. New tire = new ride height. Therefore it is quite common to need an alignment when installing new tires.
By this logic, you should need an alignment when your tires wear, not when you put new ones on.

Think about it this way. They align the car from the factory with new tires. As the tires wear, the ride height drops and it comes "out of alignment" (quotes used because the difference of a few mm in tire height is barely measurable and will not affect tire wear noticeably). When you put new tires on, it is back to the original ride height that it was aligned from the factory.

Alignments adjust camber, caster, and toe. When ride height drops, it generally affects camber. A few mm drop has a very small affect on camber, and a small change in camber has very little affect on tire wear. If anything, the additional negative camber will improve handling. The thing that really eats tires is either toe or major negative camber (from an inch or more of drop). The difference in tire tread should affect neither of those.
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Old Aug 9, 2010 | 02:25 PM
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Really? Change in tire diameter causes a camber change? Prove me that one. Changing the ride height with tire diameter will not change camber/caster/toe.

As stated above, if you were happy with your alignment (no unwanted pulls), steering wheel position (centered) and tire wear on your prior tires, then you don't need an alignment.

Getting it checked can't hurt, and you might even find worn parts before they cause a problem.

Most people, out of the 18,000 cars I've serviced, have their cars aligned or ask for their cars to be aligned way too often for no reason or for the wrong reason (suspension/brake/tire problem).
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Old Aug 9, 2010 | 05:09 PM
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Originally Posted by saintz;

Think about it this way. They align the car from the factory with new tires. As the tires wear, the ride height drops and it comes "out of alignment" (quotes used because the difference of a few mm in tire height is barely measurable and will not affect tire wear noticeably). When you put new tires on, it is back to the original ride height that it was aligned from the factory.
That was my line of thinking as well... A few millimeters of tire wear wouldn't affect alignment too drastically...

-shrug-
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