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In the 2018 Mercedes CLA 250, there's a 5 X112mm bolt pattern, meaning this car's wheels are secured by 5 lug nuts that have a diameter of 112mm (4.5 inches) when properly installed. The lug nuts feature a 17mm hex and have a thread size of M14 X1.5. It's worth noting that even if two cars have the same bolt pattern, they may not use the same type of nut, which could prevent swapping rims between them. An interesting point is that German or European cars typically use bolts, while lug nuts are more common on American rims. Mercedes bolts are longer and often tapered, while a lug nut is a shorter version of the same part. Both are essential for keeping a vehicle's wheels securely in place.
The wheel pattern for the 2016 Mercedes CLA 250 is 5x112, which is also equivalent to 5x4.41.