Mercedes Becker Radio Crack And Cause
Check the base of the knob for cracks where it mates to the shaft of the volume control. The plastic in the base can crack and cause the same erratic volume control issues. However, this knob also has a common problem. Becker Grand Prix Electronic Model BE 780Sobriquette Old Classic Vintage Mercedes Becker Grand Prix Be 1432 Car Radio Cassette Player JT Audio Mercedes Benz OEM.There are two manufacturer's for this style stereo, Becker and Alpine.1.1) Grasp the knob on the face of the stereo.Note - The knob removal is a simple process. Becker can also disarm the anti-theft device permanently at the same time.' Disarming the theft deterrent system is as easy as opening the door with the key. Buy certified rebuilt at our online discountIn either case, the radio needs to go back to Becker to be fixed (although a MB Dealer may be able to help in the anti-theft situation).
This is a valid part number even if the dealership says differently.3.1) Knob removal allows access to the volume control rheostat.4.1) Pictured is a removed volume control rheostat.Note - (Again, removal of car stereo and rheostat is not needed. Purchase at your local Mercedes parts department. Becker car stereo replacement knob part number is Q-4-82-0112.
See our Shipping Form before sending for repair. On rare occasion, this is a repair issue and may require being sent to our shop for repair. The volume problems mentioned in this DIY can be caused by a dirty rheostat.5.1) Spray a "Control/Contact Cleaner" into the top of the opening, just above the shaft at the base of the rheostat.Note - Spraying at the top of the rheostat will allow gravity to take affect and the chemical to enter the base of the rheostat.5.2) Rotate control and repeat this step several times.6.1) Align knob with rheostat shaft and push into place.Note - Most cases, this process takes care of all the problems mentioned above. Depending on the direction the control is turned, the microprocessor adjusts the volume level. (The base of the rheostat is green.) When the control is turned it sends a pulse to the microprocessor in the stereo.
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