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Home >> Mercedes Benz >> 1997 >> E320 >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Power Seats - E55, E300, E320 & E430) >> System Tests (Rear Heated Seats) >> Test 4: Left Rear Heated Seat Elements

Test 4: Left Rear Heated Seat Elements

WARNING: This page is about a different car, the 1999 Mercedes-Benz E55, 1998 Mercedes-Benz E430, 1998 Mercedes-Benz E320, and 1998 Mercedes-Benz E300. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using Harness Adapter (124 589 47 63 00), connect Breakout Box (124 589 00 21 00) to rear heated seat control module. Turn ignition switch to RUN position. Measure voltage between terminals No. 8 and 9 at breakout box. When left rear heated seat switch is off, voltage should be 0-1 volt. In position No. 2, voltage should be 9-14 volts. If voltage is as specified, go to next step. If voltage is not as specified, replace rear heated seat control module.
  2. Turn ignition switch to LOCK position. Disconnect breakout box from rear heated seat control module. Measure resistance between terminals No. 8 and 9 at breakout box. If resistance is 1.1-1.7 ohms, left rear heated seat element is okay at this time. If resistance is not 1.1-1.7 ohms, check wiring. See WIRING DIAGRAMS . If wiring is okay, replace left rear heated seat element.
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