fuse 9 = warning system check warning module, behind cluster small relay looking box bolted to firewall area, unplug to check, fuse c= check radio amplifier located at right rear side panels of 94 up wagons, earlier unsure where amp is

Is the check warning module this? http://www.peachparts.com/shopforum/tech-help/139799-w124-buzzer-advice.html . Not sure if I have an amp, but will check it, and the buzzer in the next couple days. Thanks.

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the one im thinking about is when you open the door and the lights are on you get a warning buzzer, common to fail , also when they fail the dome
lights dont work on auto

My 1994 E320 Wagon had the same problem in regards to battery drain issue. Checked all the fuses in fuse box and all good. I was stumped so I went to auto shop today to have the battery drain issue checked out. The waiting was brutal while going through my thoughts of what went wrong. Bad wiring, short somewhere, fearing the worst scenario. 10 minutes later, it turns to be a BAD FUEL PUMP RELAY, part number 001 542 9619, located behind the battery on the side of the ECM (Electronic Control Module). Although the 30 amp fuse was good but I felt the relay was rather hot after I removed it. I asked the shop owner how was he abled to find the problem so quickly? He smiled and said that is my secret!!! Made my day. I ordered a new fuel pump relay today.