Finally decided on Yokohama tires, but

[bcgreen]

for my 300CE, I am not having luck finding my size which is P225/50 R18. After reading most of the posts on tires I chose this make because of its quietness, longevity and good reviews.

[blackmercedes]

225/50-18?

That tire is 682mm in diameter. That's 26.9" tall for the metric imparied.

Your factory size is 195/65-15, which is 25.0" tall. You're WAY off for the proper size. The proper sizing is:

205/55-16 (+1)

225/45-17 (+2)

225/40-18 (+3)

And keep in mind that fitting 225 section tires on the W124 often results in rubbing.

[bcgreen]

I am just replacing what I have on the car now. There is no rubbing, and we're talking rears only. I like the look of the tires which I have had on the car for some years now. No way am I going to change down to skinny tires and wheels.

[blackmercedes]

Well, if you want to keep an oddball size, then your selection will be limited.

Call the tirerack. If they can't help, no one can.