CLK320 Convertible

If left front window function is inoperative, check the following as possible cause and repair as necessary:

• Perform TEST 5: ACTIVATION OF LEFT FRONT POWER WINDOW MOTOR BY FRONT DRIVER SIDE DOOR CONTROL MODULE  under SYSTEM TESTS.
• Perform TEST 6: LEFT FRONT POWER WINDOW VOLTAGE SUPPLY  under SYSTEM TESTS.
• Test left front power window switch. Perform TEST 8: LEFT FRONT POWER WINDOW SWITCH  under SYSTEM TESTS.