Chart
| Model | FBS3 (we do) | FBS4 (dealer) |
|---|---|---|
| C-Class | W203, W204 | W205, W206 |
| E-Class | W210, W211, most W212 | W213, W214 |
| S-Class | W220, W221 | W222, W223 |
| ML / GLE | W163, W164, early W166 | later W166, W167 |
| GL / GLS | X164, early X166 | later X166, X167 |
| GLC | — | X253 (2016 on) |
| Sprinter | W906 (most, to 2018) | W907 (2019 on) |
Transitions happened mid-generation on some models. We confirm before booking.
Why FBS4 is dealer only
FBS4 keys are made by Mercedes for each car. Independent tools can't reliably create them, so an honest locksmith sends you to the dealer.
Written by Key Monkey, European car key specialist in Marietta, GA. Updated October 23, 2026.