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Home >> Mercedes Benz >> 2000 >> ML430 >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Automatic A/C-Heater Systems) >> Trouble Shooting >> Function Tests >> Residual Engine Heat Utilization (REST) Function Test
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Residual Engine Heat Utilization (REST) Function Test

WARNING: This page is about a different car, the 2000 Mercedes-Benz C43, 2000 Mercedes-Benz C280, 1999 Mercedes-Benz C43, and 1999 Mercedes-Benz C280. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition off. Depress recirculate/rest button on A/C push button control module. Verify recirculate/rest button light in A/C push button control module is on. Adjust selector wheel to Red range. Adjust air distribution knob to 4-o'clock position. If operation is correct, heated air will vent from lower, upper and center outlets. If this mode does not operate properly, perform the following tests:

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