Go to Tire Rack for many reviews and tests.

I've been buying from them for years, and have yet to be steered wrong.

It also helps to have your own Hunter tire machine and dual plane balancer.

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles