The chassis number is important to know if you are ordering a part for your Mercedes. Since 1959, all Mercedes chassis numbers have twelve digits. The first three numbers indicate the body style; the second three numbers indicate the model; the next two numbers show where the Mercedes was manufactured, if it is driven on the right or left side and the type of transmission it has; and the final six numbers are the vehicle's serial number.
Unlock the hood by pulling on the lever by the driver's door. The lever is between the door and the steering wheel.
Open the bonnet and locate the radiator at the front of the engine compartment.
Look on top of the radiator for a metal data plate. The data plate will have the chassis number and the engine number on it. The chassis number will be labelled by either the word "Chassis" or "Fahrgestell Nr."
Another way to find the chassis number is to reference the original books that came with your Mercedes. A Data Card, which lists the chassis number, is included with these books.