How to Adjust the Lumbar on a Mercedes

1. Locate the lumbar support control on the left side of the driver's seat. It is a circular four-direction switch located directly behind the main seat control.
2. Press the top of the button to raise the lumbar support, or the bottom of the button to lower the support, to position it correctly in the curve of your lower back.
3. Press the button closest to the front of the seat to harden the support, making it more prominent. This will increase the concave curvature of the lower back.
4. Press the button closest to the rear of the seat to soften the lumbar support, making it less prominent. This will reduce the concave curvature of the lower back.