2013 GLK350 - DTCs Check when engine is on or off?

[Thugzy]

I have a 2013 GLK350. My warranty is done soon, so im trying to do a full check on the car before then.

I took the car to a Mercedes specialist and had him scan the car with his Mercedes scan tool. He said that there are multiple faults found in the system. His main concern for me is that i wont be able to get an emissions test pass done here in Ontario.

There is no Check engine light on the dash and the car drives 100% like new however..

I took the car then to the Mercedes dealer and they checked the car and said there were no codes in the system and the car is 100%

Then I bought a cheap Innova OBDII code reader and scanned the car..... here are my observations

1) When the car is completely off... No code
2) When the car is in the IG-1 (Accessories on, engine off) ....10 codes
3) When the car is started up and running.... no codes

What does this mean? What is the correct way to scan the GLK350? With the engine on or off??

In my other cars, if i had a DTC, i would see it in IG-1 or Engine on position....

Any insights would be appreciated. my GLK runs and drives like new and i do plan on keeping it for a longer time as it has been an exvcellent vehicle

 

[Ethan1]

So, is anything wrong with the car? What are the 10 codes? If there are no codes and no warning lights, why does your mechanic think it will fail emissions?

You can check for codes Key On Engine Off or Key On Engine Running. Some scan tools will even tell you to clear codes, start the car, clear codes again in some situations.

 

[eljefino]

"Legally defined" CEL-worthy codes would give you a CEL. You'll be fine.

It sounds like you have some temporary codes, like "no crank sensor" because, it's not running! You may also have modules that are offline due to not running and the car can't communicate with them.

If you scanned an ign on, eng off 1980's GM for example you always got "code 12" for "no crank signal."

That all said my Toyota runs an EVAP test 5 hours after shutdown. So I can park it without codes and find it with one the next morning.

 

[RooflessVW]

To properly diagnose and maintain your Mercedes outside of warranty, you will need a real diagnostic tool like the MB Star C3. This will allow you to troubleshoot individual modules and functions, as well as observe measured values.

Anything else is just guesswork.

 

[JC1]

https://m.youtube.com/watch?v=XV9rJwEOCus

Scotty tells you why these cars area headache to own.

 

[RooflessVW]

Originally Posted By: JC1
https://m.youtube.com/watch?v=XV9rJwEOCus

Scotty tells you why these cars area headache to own.


That was the stupidest video I've ever seen.

His voice gave me stage 3 brain cancer. All the video cuts gave me a seizure.

"Do you want a car that tells you there's a problem with the trunk light or wiring?"

Yes. Yes I do. That's the best thing about owning a modern German car. Exact, instant, precise diagnosis.

 

[artificialist]

I'm not sure how emission control warranties work in Canada, but in the USA, there is often a law stating that a car must pass smog until a certain number of miles or years has passed. In some cases it was 8 years or 80,000 miles, and in other cases it was longer than that.

That info may be buried in the fine print of the owner's manual somewhere.

 

[edyvw]

Whatever you do make sure you check counterbalance shaft. That engine is notorious for failing counterbalance shaft.
Those codes could be "hidden" codes from some previous issues.

 

[RooflessVW]

Originally Posted By: edyvw
Whatever you do make sure you check counterbalance shaft. That engine is notorious for failing counterbalance shaft.
Those codes could be "hidden" codes from some previous issues.


He has a 2013. No need to worry about the balance shaft.