We offer only service of existing product. This posting does not include any products. To add an additional key you need to select a variant option above. Symptoms of the common issues of Mercedes-Benz vehicles, which this service will repair:1)Key turns but no ignition lights2)Steering is locked with key in ignition3)Steering lock is OFF with no key in ignition4)Battery become low and the steering lock stuck in position5)Low Voltage has damaged the steering lock processors6)Key doesn't turn in the Mercedes Electronic Ignition Switch EIS7)Key doesn't turn in the Mercedes EIS when there's cold weather8)When key is in the EIS you can hear a clicking noise from the ESL but the key doesn't turn What you need to do:Remove the Ignition switch and Steering Lock (this tasks requires special skills and tools!!!) and send it to us:MBKey Group1 Compadre CircleLaguna Niguel CA 92677 We will repair your issue and mail out the steering lock, ignition switch and key within 48-72 hours of receiving your:1) Ignition switch, 2) Steering Lock,3) The key. *the steering lock will not be returned under the terms of this service. Your steering will not have a lock function. If you want to have the lock function it will require much more work from me and you – please contact me for details. I will only return the Ignition switch and the key and a small device called emulator, which will replace the communication functionality of the steering lock (it will not replace the physical functionality of the steering lock). Your vehicle will start immediately after installation. Your are all done.List of supported ignition lock part numbers: 204 545 57 32A 204 545 57 32A2045455732A 2045455732A 204 545 81 32A2045458132A204 545 81 32204 545 81 3220454581322045450632A2045450632A 2045450632A204 545 06 32204 545 06 322034621130A2034621130A203 462 11 30A 203 462 11 30203 462 11 300375456132A0375456132A 037 545 61 32A037 545 61 32037 545 61 32