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1987 300SL, 2000 E320 Wagon, 2003 SL500, 2009 SL55 AMG
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Discussion Starter · #1 · (Edited)
I am curious about what is involved in putting bigger wheels and tires on a 2003 SL500 --- I have the 17 inch AMG wheels now that came with the car and I would like to go to 18 inch or 19 inch wheels possibly in the same style. What should I know first ? What will I need to do about getting wheels to fit -- spacers, etc. ? Will it void my warranty ? And lastly, what will it do to the speedometer, auto computer, etc. ? Will I be in for problems and major $$ ? ...

Thanks,

Michael
 

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none at all

i have 20s on my car and i have no problem at all....i have 20x8.5 in the front and 20x10 in the rear....all you have to worry about it them balancing the wheels good.....besides that no problem at all.....
 

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1987 300SL, 2000 E320 Wagon, 2003 SL500, 2009 SL55 AMG
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76 Posts
Discussion Starter · #3 ·
Beautiful automobile ... how about the computer, speedometer, etc. ? Doesn't the computer have to be changed or something ?
 

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R230

As long as you keep the overall wheel/tire height within 3% of the original factory wheel/tire height you will have no issues with having the speedometer/odometer inaccurate. The other thing to keep in mind is to check whether or not your car has the tire pressure monitoring system, and whether or not your new aftermarket wheels will also accomodate this system. Lorinser's plus-sizing TUV approved fitments with their wheels for the R230 is as follows:

8.5x18 ET31 (245/40R18) Front
9.5x18 ET31 (275/35R18) Rear

9.0x19 ET31 (255/35R19) Front
10x19 ET31 (285/30R19) Rear

9.0x20 ET26 (255/30R20) Front
11x20 ET31 (305/25R20) Rear
 

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1987 300SL, 2000 E320 Wagon, 2003 SL500, 2009 SL55 AMG
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76 Posts
Discussion Starter · #5 ·
Thanks very much Ken,

This really helps me a lot .... I will look for photos of the different size wheels on an SL as maybe a 19 inch would be better than an 18 inch .... thank you again for your help.

Michael
 

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Hi, I know this thread is old but I was thinking about doing the same with my 2003 SL500. Did you ever change your wheels? If so, what are your thoughts? Thanks...
 

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Current: '07 SL550, '06 ML350 - Past: '99 ML320 (Sold), '98 SLK230 (Wrecked), 05 SL500 (Wrecked)
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Hi, I know this thread is old but I was thinking about doing the same with my 2003 SL500. Did you ever change your wheels? If so, what are your thoughts? Thanks...
I have 20" rims on mine, and here is what I can tell you from experience.

AS long as you use the same width and offset rims, you'll be OK in terms of the wheel fitting properly without shims or adapters.
The largest diameter wheel Mercedes offered was 18". The tire size for that was a 255/40/18 front, and 285/35/18 rear.

On my current rims I have 255/35/20 in the front and 285/30/20 in the rear. Because of this, the overall diameter of the wheel is just under 1" bigger than the original, so my speedometer is off by about 1mph at street speeds (30-35mph) to about 2.5-3mph at freeway speeds (75-80mph). By the same token, your odometer will be off by similar amount (about 3 miles for every hundred).

The low profile of the tires will let you "enjoy" the terrain and every pothole you go over. Moreover, your tires will wear on the inside at a much more accelerated pace due to the nonadjustable camber on the car. Depending on how you drive and what tires you're using, expect to change your rear tires at 12-15K miles, maybe less. Front s may last a bit longer 15-17K miles (maybe).

On the positive side, the handling will be great, and you'll look great going down the road.

If this is a weekend driver, then by all means, go for it. If this is a daily driver like mine... I can only tell you that I'm looking at getting a set of 18" to put back on it.

Your mileage WILL vary!
 
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