Mercedes-Benz Key Fob Replacement and Programming in Atlanta

Most of the time it's the battery, and that costs you a few minutes, not a new key. Run through this before you call:

• Range dropped: the buttons only work up close, or only sometimes. That's the classic weak battery. Swap it for the same coin cell printed on the old one.
• Spare works fine: if your second key opens and starts the car, the car is OK and the problem is in that one fob.
• Case is cracked or a button is loose: the electronics may be fine. A new shell can fix it.
• Neither key works: now it's likely the car side, often the ignition switch. Read our page on EIS problems.
• Fob was dropped in water or crushed: expect a new key. On an FBS3 car we program it at your car the same day; on an FBS4 car we order a factory key for your VIN and bring it to you.

Still stuck? Call (470) 229-2853 and describe what the fob does and doesn't do. We'll tell you what we think it is before we drive out.

FBS3 and FBS4 are the two drive authorization systems behind a Mercedes key, and we handle both, in different ways. FBS3 covers most models from about 2003 to 2014: we cut and program the new key at your car, the same day. Most cars from about 2015 on use FBS4: as a NASTF registered Vehicle Security Professional, we order a factory key for your VIN and deliver it.

The FBS4 key usually takes one day to a week to arrive, and your car stays put in the meantime. Newer generations, like the W206 C-Class or the X254 GLC, are a call with your VIN: we check before we promise anything.

The model year gives a first hint, but years overlap at the change. We confirm the system with your VIN on the first call, or you can check your model and year before you call. Price ranges by model are in the Mercedes key cost guide.