![]() Once married to a key set, DAS will only recognize keys in that set. Once performed, there is a marriage process that irreversibly locks this data into DAS. This is performed in different ways depending on which version of DAS the vehicle uses. Even though not all keys physically exist, all possible key ID's for that vehicle are loaded. This loads all the pre-defined key serial numbers into DAS as defined in FDOK. Examining the customer's photo ID and the vehicle's registration receipt generally satisfies this.įor new factory vehicles, there is an operation that performs the initial programming of DAS to introduce it to its assigned key set. For existing vehicles, the service center is required to verify that the customer ordering a key is in fact the owner of the vehicle in question. Only a factory or an authorized service center can order keys. Keys are programmed when key set is ordered for a new vehicle or an additional or replacement key is ordered for an existing vehicle. Authorized PDC's stock virgin key transponders and have special equipment to program them with valid serial numbers from FDOK. Only certain authorized employees at authorized PDC's (Parts Distribution Center) have access to this information. When the record is created for a new vehicle, a set of unique key serial numbers is assigned and stored in FDOK. If the key fails validation, even if it is mechanically able to turn the ignition switch, the ECM will prevent the engine form running.Įvery Mercedes-Benz vehicle has a record in FDOK (The Mercedes worldwide database that contains all information about ever Mercedes ever built). If a match is found, the ECM (Engine Control Module) will allow the engine to start and run, and DAS will write a new randomized rolling code to the key fob's EEPROM. These values are compared to known valid values stored in DAS. Each time the key is used in the ignition switch, DAS reads both the fixed serial number and the rolling code. Each key fob for this system contains an EEPROM chip that stores a fixed serial number and a rolling code. (6.1) I just put a new radio in it, could I have bumped something in a bad way when I put that deck in?Īny help is super useful, thanks for your time.All Mercedes-Benz vehicles manufactured in about the last dozen years use DAS (Drive Authorization System) to electronically validate the vehicle's key. The electronic key isn't working? but would the car come alive and just not start if this were the issue? I did just buy the C230 Bently Manual so have some literature on the electrical.ĥ. Starter relay or electrical issue, possibly the car isn't even giving power to the starter. ![]() Seems to be the kind of thing you replace if you suspect it.ģ. There were no warning signs, but this could be an option, not sure how if at all this car be tested. Take battery to get checked, I tested with volt meter when trying to start car, there is no amperage draw so the battery seems fine to me.Ģ. Troubleshooting: I guess I've got a few things I'm leaning towards investigating further.ġ. ![]() Dash lights up, car seems to come alive when I turn the key to start but the starter doesn't even turn. The Problem: The other day, wouldn't start. Hey All, Wondering if I'm headed the right direction with my troubleshooting? ![]()
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