Retrofit steering wheel heater power supply wiring harness - AN46.11-P-0001-01EW

MODEL 212.0##/1## 1# 

MODEL 218.3## 1# 

Connection scheme 

Fig 1: Steering Wheel Heater Control Unit Connection Schematic

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Routing diagram 

Fig 2: Steering Wheel Heater Control Unit Routing Diagram

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1. Attach round cable lug (10) with inside diameter of 6 mm at brown line (br).
   Fig 3: Attaching Round Cable Lug At Brown Line

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Fig 4: Driver Footwell Cable Duct And Power Supply Wiring Harness
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2. Connect brown line (br) of power supply wiring harness at left front footwell ground point (W15/5).
3. Open driver footwell cable duct (3).
4. Route red line (rt) of power supply wiring harness from left front footwell ground point (W15/5) to driver footwell cable duct (3).
   Fig 5: Driver Footwell Cable Ducts, Left Floor Covering B-Pillar Cable Duct And Rear Passenger Compartment Left Floor Covering

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5. Open all driver footwell cable ducts (3).
6. Place left floor covering (5) in rear passenger compartment to one side.
7. Open left rear passenger compartment cable duct (6).
8. Route red line (rt) along driver footwell cable ducts (3) to B-pillar.
9. Route red line (rt) into the B-pillar cable duct (4) using a pull-through device.
10. Route red line (rt) along left rear passenger compartment cable duct (6).
11. Close left rear passenger compartment cable duct (6) and driver footwell cable ducts (3).
Fig 6: Left Rear Passenger Compartment Cable Duct And Driver Footwell Cable Ducts
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12. Route red line (rt) from left rear passenger compartment cable duct (6) along vehicle wiring harness (9) into trunk as shown.
13. Fix red line (rt) in place on vehicle wiring harness (9) using cable ties.
Fig 7: Routing Red Line Along Cable Duct
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14. Route red line (rt), as shown, along vehicle wiring harness to cable duct (8).
15. Route red line (rt) along cable duct (8) in trunk to rear SAM control unit with fuse and relay module (N10/2).
16. Fix red line (rt), as shown, to vehicle body with felt tape (7).
17. Fix red line (rt) in place on vehicle wiring harness using cable ties (arrows C).
Fig 8: Locating Transparent Fuse Holder
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18. Unclip transparent fuse holder (7-pin) (2) from brackets (arrows D) on rear SAM control unit with fuse and relay module (N10/2).

    Only for vehicles in which the transparent fuse holder (7-pin) (2) is already installed.

Fig 9: Opening Transparent Fuse Holder Locks
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19. Open locks (arrow A and B) on transparent fuse holder (7-pin) (2).

    On vehicles in which the transparent fuse holder (7-pin) (2) is already installed, this holder is used. Otherwise, the transparent 7-pin fuse holder (2) included in the package contents is to be used.

20. Install red line (rt) in the slot "1" of the transparent 7-pin fuse holder (2) and lock it (arrow B).

    The numbering of the slots is on the rear of the transparent fuse holder (7- pin) (2).

Fig 10: Attaching Transparent Fuse Holder Into Color-Coded Slot On Rear SAM Control Unit
Courtesy of MERCEDES-BENZ USA
21. Install electrical fuse 65 (N10/2f65) with power of 7.5 A into the slot "1" of the transparent 7-pin fuse holder (2) and close the lock on the transparent 7-pin fuse holder (2).
22. Clip transparent fuse holder (7-pin) (2) into marked colored slot on rear SAM control unit with fuse and relay module (N10/2).