2015 Mercedes-Benz E 550 — Cabriolet
The 2015 Mercedes-Benz E 550 Cabriolet shipped with 4 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.
This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.
235/40R18 (Front)
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (94 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~25.4" |
| Revolutions per mile | ~794 |
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255/35R18 (Rear)
| Section width | 255 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (89.3 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~25" |
| Revolutions per mile | ~806 |
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235/35R19 (Front)
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (82.3 mm) |
| Rim diameter | 19" |
| Overall tire diameter | ~25.5" |
| Revolutions per mile | ~792 |
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255/30R19 (Rear)
| Section width | 255 mm |
|---|---|
| Aspect ratio (sidewall height) | 30% (76.5 mm) |
| Rim diameter | 19" |
| Overall tire diameter | ~25" |
| Revolutions per mile | ~806 |
Compare prices at:
What this size means for your Mercedes-Benz E 550
On the 2015 Mercedes-Benz E 550 Cabriolet, the factory 235/40R18 measures about 25.4″ in overall diameter with a 94 mm (3.7″) sidewall, and completes roughly 794 revolutions per mile. Its 40-series aspect ratio gives a low-profile sidewall tuned for sharper handling, common on sport trims and larger-wheel packages. In tire terms it is a passenger (P-metric / Euro-metric) size.
This is a staggered setup: the front axle runs 235/40R18 and the rear runs 255/35R18. The two sizes are not interchangeable, so order each for its correct axle and don't rotate front-to-rear.
Other 2015 Mercedes-Benz E 550 trims
- 4MATIC Sedan 245/40R18
- Coupe 235/40R18 (Front) / 255/35R18 (Rear) / 235/35R19 (Front) / 255/30R19 (Rear)
Mercedes-Benz E 550 tire sizes by year
- 2017 Mercedes-Benz E 550 235/40R18 (Front) / 255/35R18 (Rear) / 235/35R19 (Front) / 255/30R19 (Rear)
- 2016 Mercedes-Benz E 550 245/40R18
- 2014 Mercedes-Benz E 550 245/40R18
- 2013 Mercedes-Benz E 550 245/40R18
- 2012 Mercedes-Benz E 550 245/40R18
- 2011 Mercedes-Benz E 550 245/40R18
- 2010 Mercedes-Benz E 550 245/40R18
- 2009 Mercedes-Benz E 550 245/45R17 / 245/40R18
- 2008 Mercedes-Benz E 550 245/45R17 / 245/40R18
- 2007 Mercedes-Benz E 550 245/45R17
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.