Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Electrically adjustable seats E63, E64: Introduction
The E63 and E64 will feature electrically adjustable driver's and passenger's seats as standard.
Electrically adjustable sports seats will be optionally available. The sports seats additionally feature a manual seat depth adjustment facility, more pronounced formed seat upholstery and a lumbar support.
The electrical control is identical for both the basic seat and sport seat.
In both seat versions, the driver's seats are additionally equipped with a seat memory.
The body bus (K-bus) connects the driver's seat module (SMFA) to the center console switch cluster (SZM). In the E64, the passenger's seat module (SMBF) is also connected to this K-bus.
the center console switch cluster represents the interface between the K-bus of the seats and the body controller area network (K-CAN). The K-CAN and center console switch cluster (SZM) therefore connect the seat control units to the control units of the body electronic systems.
For more information, refer to E63/E64 SYSTEM OVERVIEW, BASIC SEAT AND SPORTS SEAT .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.