multiple dash error lights
Thread Starter
Newbie
Joined: Jan 2025
Posts: 7
Likes: 0
multiple dash error lights
My dash is telling me my R&L indicators don't work (they do) Dash indicates my blind spot assist doesn't work. Days later my rear camera stopped working, high beams don't work and cruise control doesn't work. Dash then indicated traction control and abs don't work along with tire pressure monitor. Dash lite up like a Christmas tree. Had it in to a service station where a mechanic claimed he works on MB but he gave up after half a day. Any ideas?
MBWorld Fanatic!
Joined: Jun 2021
Posts: 1,013
Likes: 281
From: South Texas
2014 GLK350 base model (active) ; 2001 E320 base (retired); 2001 Wrangler soft-top
Welcome to the Forum.
Crazy wild guess ... bad battery or alternator.
If a mechanic "familiar with MB" spends hours and can't figure out the problem, I'd avoid them.
For the stuff that doesn't require the engine to be running, do they work ? (like high beams or rear camera)
Crazy wild guess ... bad battery or alternator.
If a mechanic "familiar with MB" spends hours and can't figure out the problem, I'd avoid them.
For the stuff that doesn't require the engine to be running, do they work ? (like high beams or rear camera)
Last edited by calder-cay; Jan 24, 2025 at 03:45 PM.
MBWorld Fanatic!
Joined: Sep 2015
Posts: 2,585
Likes: 343
2013 glk 350
So you don’t know if you have proper voltage , only a meter can tell you . Alternators go bad . Low voltage is the usual cause of what you are experiencing. The main battery is the question
Last edited by Mmr1; Jan 25, 2025 at 06:36 AM.
MBWorld Fanatic!
Joined: Jun 2021
Posts: 1,013
Likes: 281
From: South Texas
2014 GLK350 base model (active) ; 2001 E320 base (retired); 2001 Wrangler soft-top
The alternator recharges the car's battery while the engine is running.
The alternator supplies power to the car's electrical components, such as the headlights.
The alternator ensures that the car's electrical systems receive a constant supply of electricity.
There's also a possibility that there is a "bad electrical connection" somewhere.
...
...
One reason I asked the question, which NEVER got answered:
"For the stuff that doesn't require the engine to be running, do they work ? (like high beams or rear camera)"
Trending Topics
MBWorld Fanatic!
Joined: Sep 2015
Posts: 2,585
Likes: 343
2013 glk 350
12.9 is 100%, 12.75 is about 90%, 12 is too low and about 50%. How was it tested. It should not drop to much when cranking . What you described is a voltage issue . Did it do the same thing after you put a charger on it ? I would put a charger on it if it’s an AGM battery charger needs an AGM cycle to fully charge it . If battery holds voltage but has no power, being bad, that could cause the problem. A bad regulator can cause charge issues . The alternator itself lasts , but you have to remove the alternator to replace the regulator. You should find out how the battery is performing first , the rest voltage , drop when starting , a load test. I would charge it first
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
Super Member
Joined: Mar 2013
Posts: 915
Likes: 185
Yikes:
How long have you had your GLK? Any recent-ish accident repairs, re-painting, electrical modifications or additions? Flood vehicle?
How many miles/kilometers on the car?
Last edited by MBKLUE; Jan 26, 2025 at 01:40 AM.
MBWorld Fanatic!
Joined: Jun 2021
Posts: 1,013
Likes: 281
From: South Texas
2014 GLK350 base model (active) ; 2001 E320 base (retired); 2001 Wrangler soft-top
A SAM is "Signal Acquisition Module" - it's a central electronic control unit that receives data from various sensors and switches throughout the vehicle, then sends signals to activate different components like lights, windows, and locks; essentially acting as a hub for managing various electrical functions within the vehicle.
If I remember correctly, there's two on our 2014 GLK 350 Base - one under the hood on driver side and one in the rear "trunk" compartment.
(don't hold me to the number and locations, because I've yet to deal with them).
If I remember correctly, there's two on our 2014 GLK 350 Base - one under the hood on driver side and one in the rear "trunk" compartment.
(don't hold me to the number and locations, because I've yet to deal with them).
