Mercedes W177 / GLB X247 / GLA H247 / B-Class Electric Seat Rail Upgrade Kit (OEM-Style Door Switch)

$ 575.00

Designed for MFA2 platform vehicles (A-Class W177, GLB X247, GLA H247, B-Class), this kit converts manual front seats to powered operation by replacing only the lower rail assembly with a motorized system. It includes an OEM-style door switch and matching perforated trim panel to keep interior aesthetics factory-consistent. No full seat cushion or frame swap required, preserving safety components and reducing cost. Future memory upgrade supported via reserved interface

Driver seat standard; passenger seat optional. Year-to-year trim variance may require photo validation (VIN + door-seat photo)

Description

Video show:https://www.instagram.com/reel/DKHeZloP_1i/?igsh=ZHR2OTBnNGQydmZs

FAQ (Bilingual)

Q1
Can I convert my manual Mercedes W177/GLB/GLA/B seat without replacing the whole seat?

Yes. This kit motorizes only the rail assembly, retaining factory cushion, frame, and safety modules.

Q2
Does the retrofit affect airbags or inspections?

Safety components remain untouched if installed professionally; use proper fused power.

Q3
Is seat memory included?

Not in the base kit; wiring reserves interfaces for future memory upgrade.

Q4
What are advantages vs full OEM electric seats?

Lower cost, less logistics, safety retention, modular expansion.

Q5
Is coding required?

Basic rail motion typically not; memory or integration with displays may require variant coding.

Q6
Noise level after conversion?

Low mechanical hum only; abnormal noise indicates misalignment or harness interference.

Q7
Can both seats be upgraded?

Yes; passenger seat optional—confirm photos first.

Q8
Warranty terms?

12-month motor/rail warranty excluding misuse, liquid ingress, altered wiring.

Q9
Memory with mirrors later?

Yes if mirror modules support position feedback and coding is applied.

Q10
Need drilling or welding?

Normally no; uses existing mounting points.

 

 

  • Peak current (single direction): 18–22A (short duration)
  • Main power wire gauge: ≥2.5 mm² OFC
  • Motor type: DC reduction
  • Memory expansion: Supported via optional module
  • Install time (one seat): 2–3 hours (professional)
  • Safety compatibility: Airbag, pretensioner, OCS retained
  • Operating temp: -20°C to +60°C
  • Voltage: 12V vehicle system

 

Additional information

Vehicle Model

W177 A-CLASS, GLA X247, CLA C118, H247 B-CLASS, GLB

Seat

Driver's seat, Passenger seat

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