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Old 04-17-2003, 01:27 PM
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MTI MTI is offline
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Join Date: Nov 2002
Location: Scottsdale, Arizona
Posts: 10,627
The impression is that the cruise control amplifier circuit reads the resistance from the brake light and due to MB's "design" a difference in the resistance can cause damage to the amplifier circuit. Since the OEM bulbs are so cheap, why risk it. The most common problem with 80-90's MB cruise controls is the fragile circuit boards and their tendency to break solder joints (age, vibration). Over time, the weakening joints slowly deteriorate the electrical connection on the board, showing up as eratic cruise operation, until eventual failure.
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