Subject: Any interest in REAR heated seats for your E39? Author: ripp222 : member since January, 2006 : 189 posts Posted on: 2007-10-06 11:14:48

I'm going to sell the OEM parts for adding REAR heated seats to an E38 7-Series, but realized it wouldn't be too hard to adapt them to the E39 Sedan--just some extra parts and 3 wires to run (power, ground & illumination).
It would require removing and modifing the center console to properly mount the 2 switches below the rear cup holder or cubby hole.

Is their much interest out there?
I suppose it would be the ultimate Cold Weather Package...

On a related note, here's the diagnostics per WDS
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The cushion surfaces and backrests are heated with the seat heating system. The seat heating can be switched on as of
terminal 15 by pressing the button. The LED integrated in the switch lights to act as a function indicator.
The seat heating is switched off by pressing the button once again or switching off the ignition.
The seats are heated by means of four heating elements incorporated in the upholstery.
The electronic circuitry integrated in the switch controls and monitors the seat heating function.
The heating temperature can be adjusted by means of a potentiometer within the range from 20 C to 42 C.
The temperature is measured by a temperature sensor in the seat upholstery and passed on to the electronics
integrated in the switch.
The electronic circuitry controls the heating function such that the set temperature is reached in the fastest
possible time. The heating capacity is then reduced.
Note: Current supply to the heat conductor of the seat heating electronics is interrupted if the vehicle battery voltage
drops below 11.8 volts. The function LED installed in the switch however remains on. Current supply to the heat
conductor is resumed when the battery voltage again reaches 11.8 volts.
The seat heating electronics monitors the temperature sensor and the heating elements for faults.
If a break or short occurs at the temperature sensor, the seat heating is switched off in order to prevent overheating.
If a fault is recognised, the function LED installed in the switch flashes for 12 seconds when the fault occurs, or, if
the fault is already present, when the seat heating is switched on.
A flash code shows what faults the electronic circuitry has currently detected.
Flash code output is started by following procedure:
- Switch off ignition
- Press and hold the button for seat heating
- Switch on ignition (terminal 15) with button depressed
- Release the button and press it again briefly
The following faults can be indicated:
Flashing Defect
Once: Switch faulty (potentiometer or electronics) or switch overheating due to a short-circuit
Twice: Temperature sensor has break or short
3 times: All 4 heating elements broken or have a short (probably break or short in wiring harness)
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My ride...

04/1999 build 740i, Anthracite w/ Black Montana Leather

Updates...
8-150-492 Front Strip (liscense plate delete)
0-006-783 Clear Indicator Set
9-115-032 MKIV Computer w/ 6-923-879 Widescreen Monitor
New Gen Radio comming soon...

• Any interest in REAR heated seats for your E39? - ripp222 2007-10-06 11:14:48 (262 views)
  • Re: Any interest in REAR heated seats for your E39? - viperian86 2007-11-04 16:22:34 (74 views)
  • Oh man, I'm tempted. But I'm in SoCal. I rarely use them. - visionbmw7 2007-10-07 03:43:59 (95 views)
    • What would pricing look like? (nt) - viperian86 2007-10-17 17:52:00 (117 views)
      • Re: What would pricing look like? - ripp222 2007-11-22 09:01:46 (46 views)