Need help in troubleshooting as I do not have access to detailed wiring diagrams. In my ’94 SL500 with an automatic transmission, whenever I move the shifter to ‘B’ (1st gear), fuse #6 blows within a couple seconds. If it is very quiet, such as in the garage, I can faintly hear a whining noise from the engine compartment from the moment I shift to ‘B’ and when fuse #6 blows. This problem is very repeatable and happens whenever the shifter is moved to position ‘B’. Normal driving does *not* blow fuse #6, although this vintage begins accelerating in 2nd gear from a dead stop - normal operation.

According to the Fuse Designation Card in the main fuse box, fuse #6 protects “Relay Left Safety Package, Backup Lamp, Horn, Power Soft Top Control Unit (Fanfare Horns, Outside Temperature Gauge)”. These items all seem to work individually, without fuse issues. However, when fuse #6 blows, the power windows stop working (?) and there is a steady, repeating 'beep-beep-beep' that is heard from around the passenger foot well.

I believe the problem (a short or defective component) is somewhere in the electrical circuit between the ‘B’ Gear Switch (located directly under the shifter gate and activated by the shifter) and the transmission. Somehow, this electrical circuit is tied into fuse #6.

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