BMW Multi-Function Steering Wheel/Cruise Control Retrofit Guide

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This article show a guide on how to perform BMW Multi-Function steering wheel/Cruise control retrofit.The installation time is approx. 1 hour, but this may vary depending on the condition of the car and the equipment in it.

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Before Starting You Need to Remove Below Units:

MFL/GRA wiring harness connection diagram

Installation and cabling diagram

1. Steering column switch mounting

2. Multi-functional steering wheel

3. Light switch unit

4. Electrics box

To install and connect the MFL/GRA retrofit wiring harness

Disconnect and release the green, 10-pin plug X10170 from the switch mounting (1).

Lay the retrofit wiring harness (2) along the cable guide on the steering column to plug X10170.

Connect branchesA1-A3 as follows to plug X10170:

Branch A1, BL/SW cable, in PIN 8

BranchA2, WS/RT/GE cable, in PIN 9

BranchA3, VI/GE cable, in PIN 10

Assemble plug X10170 again and reconnect it to the switch mounting (1).

Remove the cable insulation (1) over a length of approx. 50 mm.

Cut the VI/GE (PIN 27) and WS/RT/GE (PIN 21) cables from plug X12 approx. 40 mm behind the Plug X12.

Fit the ends of the cables with a socket/pin contact and insulation casing (1).

Lay branches A4-A5 to plug X12 and connect to the same colours on the new connections.

To install and connect the MFL/GRA retrofit wiring harness Secure the plug connectors to the wiring harness using cable ties (1).

On RHD cars the tied back cable on branch A6 must be released.

Branch A6 must be laid through the corrugated tube behind the heating/air conditioning unit to the left-hand side of the car and from there into then electrics box.

Lay branch A6 through the cable passage into the electrics box.