The turn signal switch is made of durable plastic material, and has gone through testing so that you will get a fairly reliable switch to give you full control of various vehicle systems. This multifunction switch is manufactured to the part number specification to provide factory fresh appearance and direct fit. part number connector helps ensure a solid, positive connection. The turn signal switch has gone through testing so that you will get a fairly reliable switch to give you full control of various vehicle systems Vehicle Specific Fit:for Mercedes-Benz Truck part Number:6555400145 Product Information:Placement on Vehicle: Front Pin Number:15(8+7) Colour:black Material:plastic How to use: Step1: Push the new turn signal switch into its slot. Step2: Push both small and large wire connector harnesses into the turn signal switch. Step3: Remount the bottom half of the shroud to the steering column. Remember to stretch the lock groove around the lock lever for reinstallation Step4: Screw the bottom half of the shroud back onto the steering column. Snap top half of shroud into the bottom half of shroud, adjusting as necessary around the turn signal Tip: If the product flashes after installation, it is not compatible. Professional installation is highly recommended! Compatible vehicles above for reference only! Package Contents: 1 * Car Steering Column Turn Signal Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.