Get everything you need right here on MB Parts Express. Order your Union Nut (3870010103) right here online and we will ship it right to your door! Being a genuine OEM part your Union Nut will be guaranteed to fit your vehicle. All the parts you buy from us will also be backed by a manufactures warranty. And don't forget you can put in your VIN at checkout as one final check to be sure all the parts you are buying fit your specific vehicle. 

To shop from your specific model's full OEM parts catalog, start by selecting what Mercedes-Benz model you are shopping for here.