Mercedes-Benz infrared car key repair

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Cleaning off the old solder

Before you do that, however, you'll need to remove all remains of the old solder joints.
Apply heat to the joint. Once the solder liquifies, clean the spot with the desoldering braid.
The soldering iron radiates extreme heat! Be careful not to damage the capacitors, or you've had it.
Make sure to do that on all four joints.

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