Multiple problems
Thread Starter
Newbie
Joined: Jul 2021
Posts: 8
Likes: 1
C250
Multiple problems
I have a question one morning I started my car find with no problem and no message, shut off the car. Later on I was going out and my car didn't start and I got multiple faults. My fault engine light, right and left malfunction, srs requieres service, tire pressure monitor, cruise control, pre-safe, ant-skid symbol and stabilization inop, trunk wont open, no radio, no interior lights, no horn. I replaced the battery, removed my PCM and got it check and it is good. Checked all fuses. I need help?
I GOT IT FIXED FINALLY ! MY FINDING WAS INSIDE MY PRE FUSE BOX LOCATED IN FRONT OF THE BATTERY. ALL THE ABOVE FAULT WAS CAUSE BY A BLOWN 80A FUSE INSIDE MY PRE FUSE BOX. IS TRICKY TO GET OUT AND AFTER OPENING IT I CHECK FOR CONTINUITY AND FOUND THE 80A FUSE WAS BLOWN. INSIDE THE PRE FUSE BOX YOU WILL SEE THE SQUID THAT WILL SHUT DOWN YOUR VEHICLE AFTER AN AIR BAG DEPLOYMENT , ALSO A 100A AND 150A INSIDE PLUS SMALL FUSE. I DID RESEARCH WITH THE POST FROM THIS SITE, ALSO ALL DATA SITE FOR SCHEMATICS AND YOU TUBE HOW TO REMOVE THE UNIT. ONCE I CHANGED THE FUSED THAT COST $8 AT NAPA AUTO PARTS WHO HAD IT ON HAND. IF I ORDER IT ONLINE IT WOULD TAKEN A FEW DAYS THAT I DID'T HAVE. ALL MESSAGE FROM DASH WHERE GONE EXCEPT THE SRS THAT I GOT A FRIEND TO ERASED IT. ALSO I ERASED THE MEMORY FOR ALL OTHER FAULTS STORE IN THE CAR COMPUTER. IMPORTANT IF CHANGING THIS BOX THE BATTERY IS THE FIRST THING YOU REMOVE AND THE LAST THING YOU INSTALLED TO AVOID SHOCKS OR AIR BAG FUSE BEEN BLOWN.
I GOT IT FIXED FINALLY ! MY FINDING WAS INSIDE MY PRE FUSE BOX LOCATED IN FRONT OF THE BATTERY. ALL THE ABOVE FAULT WAS CAUSE BY A BLOWN 80A FUSE INSIDE MY PRE FUSE BOX. IS TRICKY TO GET OUT AND AFTER OPENING IT I CHECK FOR CONTINUITY AND FOUND THE 80A FUSE WAS BLOWN. INSIDE THE PRE FUSE BOX YOU WILL SEE THE SQUID THAT WILL SHUT DOWN YOUR VEHICLE AFTER AN AIR BAG DEPLOYMENT , ALSO A 100A AND 150A INSIDE PLUS SMALL FUSE. I DID RESEARCH WITH THE POST FROM THIS SITE, ALSO ALL DATA SITE FOR SCHEMATICS AND YOU TUBE HOW TO REMOVE THE UNIT. ONCE I CHANGED THE FUSED THAT COST $8 AT NAPA AUTO PARTS WHO HAD IT ON HAND. IF I ORDER IT ONLINE IT WOULD TAKEN A FEW DAYS THAT I DID'T HAVE. ALL MESSAGE FROM DASH WHERE GONE EXCEPT THE SRS THAT I GOT A FRIEND TO ERASED IT. ALSO I ERASED THE MEMORY FOR ALL OTHER FAULTS STORE IN THE CAR COMPUTER. IMPORTANT IF CHANGING THIS BOX THE BATTERY IS THE FIRST THING YOU REMOVE AND THE LAST THING YOU INSTALLED TO AVOID SHOCKS OR AIR BAG FUSE BEEN BLOWN.
Last edited by Joonie M; Jul 29, 2021 at 11:15 AM.
Super Member
Joined: Jun 2017
Posts: 608
Likes: 107
From: Western NC
2009 MB C300 Sport 4matic
Would have first said battery going bad but you replaced and still a "no Go". Do you show power going to your fuses in the front SAM ? If not, high amp fusible link may be blown.
Thread Starter
Newbie
Joined: Jul 2021
Posts: 8
Likes: 1
C250
Front Sam you are talking about is the one next to the battery. Car cranks but does not start and has all does fault. That fuse could cause all those faults?
Last edited by Joonie M; Jul 21, 2021 at 12:44 PM.
