I got Mercedes S500. Rear fuse box under the rear seat Oct 28, 2010I got Mercedes S500 fuse box under the rear seat reads only One Volt. I accidentaly touch the ground with with this fuse box trying to put it in it's place checking relays on this box Spark probably blown fuse, i believe in X4/22 which according to diagram is a terminal block and fuse box (circuit 30z). I do not know how to locate this X4/22 physical locations to check this fuse?5/5eurotec : Hi, I've attached the location of the fuse block below. eurotec : Full Size Image eurotec : I believe you will need to replace the fuse block if it's bad. I don't think there are serviceable fuses there. Customer : Where is it located on vehicle? Customer : Do you believe that on fuse 3 should be battery votage, right? not only one Volt? The picture shows it mounted in the trunk at the right rear of the car. You need 12 volts to the fuses when the circuit is live.Yes I am. It looks to be near the fuel filler neck. I show power to the rear fuse box under the seat coming from the X4/22.Hi, I just arrived home. I'm looking at this now.Do any of the fuses in the rear fuse box have 12 volts?I show that terminal block near the filler neck. Do you not see it?Let me know if you need more help with it. I'll be around. s500 mercedes fuse box | eBay www›Search›s500 mercedes fuse boxFind great deals on eBay for s500 mercedes fuse box. Shop with confidence. Skip to main content. eBay Logo: 2000-2006 MERCEDES BENZ S500 W220 RELAY FUSE BOX MODULE K1831. Mercedes-Benz. $99. or Best Offer. Mercedes Rear Fuse Box Block With Relays W140 S320 S420 S500 S600 1405454840 OEM See more like this.