Preparation for Test: 1. CAUTION! See 22/1 2. Fuses OK. 3. Battery voltage 11 - 14 V 4. Convenience Feature functional.

		Test scope	Test connection			Test condition	Nominal value	Possible cause/ Remedy1)
1.0		Left rear power vent window switch (S21/13) Function	B	M21/8	A	Disconnect connector at left rear power vent window motor (M21/8). Press upper half of switch: Press lower half of switch:	11 - 14 V - 11 to - 14 V	Wiring, 1.1
1.1		Left rear power vent window switch (S21/13) Function	6	X18	20	Disconnect connector at Interior/taillamp harness connector (X18) (12-pole). Press upper half of switch: Press lower half of switch:	11 - 14 V - 11 to - 14 V	Wiring, S21/13
2.0		Left rear power vent window motor (M21/8) Activation	M21/8 A B		+	Ignition: OFF Disconnect connector at motor. CAUTION! See notes on 22/1 For battery connection, use safety cable 124 589 37 63 00	Window motor runs.	Wiring, M21/8
3.0		Right rear power vent window switch (S21/14) Function	A	M21/9	B	Disconnect connector at right rear power vent window motor (M21/9). Press upper half of switch: Press lower half of switch:	11 - 14 V - 11 to - 14 V	Wiring, 3.1
3.1		Right rear power vent window switch (S21/14) Function	7	X18	21	Disconnect connector at Interior/taillamp harness connector (X18) (12-pole). Press upper half of switch: Press lower half of switch:	11 - 14 V - 11 to - 14 V	Wiring, S21/14
4.0		Right rear power vent window motor (M21/9) Activation	M21/9 A B		+	Ignition: OFF Disconnect connector at motor. CAUTION! See notes on 22/1 For battery connection, use safety cable 124 589 37 63 00	Window motor runs.	Wiring, M21/9

1) Observe Preparation for Test, see 22.