Q: GL450 has no power. It’s completely dead.

asked by on March 01, 2018

GL450 has no power. It was running fine. Then suddenly is completely dead. Steering wheel won’t turn. Lights dead. Seats won’t move. Locks don’t work. Breaks locked. I cleaned the backseat carpets 24 hours before the problem and poured water on the carpets to get the stain up but dried up the water. Could I have inadvertently shorted the electrical system?

My car has 104000 miles.
My car has an automatic transmission.

Battery is dead Inspection $79.99 - $89.99 Get a Quote
Electric Problems Inspection $79.99 - $89.99 Get a Quote

It’s possible the battery might just be coincidentally dead. So, to rule that in or out, the first thing to do is load test the battery. If the battery is fully charged, then an electrical system diagnostic must be performed. The carpet cleaning might be related to the outage and you will know for sure once a diagnostic is performed. The situation is not as dire as you might think though. A worse circumstance (much worse) would exist if you were writing in stating, "sometimes there’s full power, sometimes there isn’t". A global electrical failure of the type you’re describing will often have one big obvious (non-intermittent) cause (or limited causes) in one spot. Basically, with regard to any of those circuits you refer to, you just do a circuit trace. At some "early" (close to the battery electrically speaking) point there is likely to a major fault (interruption) in the circuit. That could be a fuse, fusible link, ground connection, circuit opening relay, power center component, and so forth. The fault may be common to all of the circuits that are out but certainly will pertain to at least a few. If you want a prompt resolution of this, right at your location, please request an electrical system diagnostic. If you request that service, the responding certified mechanic will get this diagnosed and resolved, right at your location. If you have further questions or concerns, do not hesitate to re-contact YourMechanic because we want you to make the most of your repair dollars and help you to get the best possible results.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

When doing a radiator flush - do you need to replace the thermostat or any other components of the cooling system

Doing a radiator flush does not require any other component to be replaced. However, if the system has a lot of debris and scale in it, the thermostat may need to be replaced if it gets clogged or corroded. The...

My brakes squel even though I have recently replaced pads and rotors.

Sometimes inexpensive brake pads will squeal even when new. Something you can try is to use some anti-brake squeal spray or lube designed for the backing plates of the brake pads. These can help with the high frequency vibrations that...

Bad Ecu

Any time a computer module is replaced it needs special programming to work with your vehicles other modules and program it to start and run your engine. The programming for the ECU can only be done by a specialized scanner...

Start error on Mercedes

If you have another key, try to start it with that 2nd key. If it starts, then the DAS (Drive Authorization System) is good and only the 1st key has lost synchronization. Try this with the non-functioning key: Insert the...

Car won't pass state inspection due to emissions problem..

Yes, a certified mechanic from YourMechanic can test the EGR system on the engine and determine if the problem is the valve, the passageways, or the electronic controls. Once the root cause of the fault is understood, obviously you would...

Battery keeps draining can it be a relay? 2007 GMC Sierra 1500

Hello - yes, it could be a stuck relay, or some other electrical component that is not shutting off when it should. To isolate the source of the battery drain, connect an ammeter to the positive (red) battery cable, observe...

My gear shift housing Is made of pastic a piece of it broke off.

It sounds like your shift cable has failed, and needs to be replaced. The part you're describing sounds like the plastic end of the cable, and it attaches to a metal part of the shifter. When this breaks, the entire...

Trunk popping open while driving

It sounds like you are on the right track. The most common cause would be an issue with the locking assembly but if the car is equipped with a switch to open the trunk that could also be an issue....

changing timing belt on 10 year old car with 52k miles, not required till 102 k but decade old belt= bad?

My suggestion would be to take a close look at the belt for microscopic cracks or signs of deterioration. If anything is noted, I would spend the money and replace it as this is a relatively cheap "insurance policy" against...

Related articles

Mercedes-Benz Certified Pre-Owned (CPO) Car Program
Shopping Shopping for a used Mercedes-Benz vehicle often leads many drivers to consider certified pre-owned options. Mercedes-Benz is one of many manufacturers that have a certified pre-owned (CPO) program. Each car manufacturer structures their CPO program differently; read on to...
How to Source Parts For a Classic Mercedes-Benz
Classic Classic Mercedes-Benz cars are just as elegant and gorgeous as current model year Mercedes vehicles in many cases. There is a devout following dedicated to classic Mercedes vehicles who are passionate about the technology, styling, and responsive handling that...
A Buyer’s Guide to the 2012 Mercedes-Benz G-Class
Combining Combining rugged performance with an iconic boxy exterior style, the 2012 Mercedes-Benz G-Class is a hallmark of the SUV segment. It manages to combine true off-road capabilities with luxurious comfort and outstanding on-road performance in a way that most...