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I am sceptical that the device is intelligent. I believe that the battery is simply exhausted. A replacement battery is expected to arrive this evening, and I hope that the device's performance will improve after the new battery is installed. No text provided. Thank you.

I wanted to share an experience I had. I encountered a problem with my car's instrument cluster after my battery went flat. Even after charging the battery overnight, the instrument cluster remained unresponsive, and I was considering replacing it. However, while driving to work, I had a wireless OBD2 device plugged in, which provided me with the dashboard information such as speed and battery voltage. I noticed that as soon as the battery voltage reached 13.3V from 13.2V, the instrument cluster suddenly started working again. I attempted various troubleshooting methods such as replacing fuses, disconnecting the battery, leaving it disconnected overnight, and researching cluster faults on online forums. I had hoped that the battery would regain enough charge to surpass 13.2V while connected to a charger, but unfortunately, this did not occur. This experience serves as a reminder that a failing battery can mimic issues with the SAM or cluster in older waggons. I have ordered a new battery to resolve the situation.

How did you accomplish it first, considering that it is "not advisable for someone without prior experience"? 🤔

Contact a nearby automotive repair shop and inquire for assistance. Prices exhibit geographic variability.

An effective solution may be created by combining water and white vinegar in equal proportions. https://detaildiy.com/how-to-remove-rain-x-completely/

Have you verified the ATF level when the vehicle was at operating temperature (after a 20-minute drive), with the engine running, and on a flat surface?

Are the windows partially open, or just slightly open? Leaving the automobile windows open beyond a small opening does not enhance the vehicle's security even if it is locked. Based on the information provided, it seems that the dogs you have are not easily stealable, else you would not leave them alone in a vehicle with open windows.

Have you contemplated the possibility of not securing the car?

Put forth a significant amount of effort to earn the money, yet the result is aesthetically pleasing.

Are there dry joints in the fuel pump relay? The two-stage starting and running components may be readily fixed or resoldered if necessary. Refer to YouTube for instructional videos on how to do this.

Opinions on an unused connector? Seems peculiar to me. Could that be from under the bat's wing? Two connectors? Swirl flap motor?

I am very inclined to test an air mass metre (batwing). A test in Star involves modulating the EGR valve and observing the air mass response within a certain range. You will get this error code if the value is beyond the specified range. Avoid being lured by inexpensive batwings on eBay since I have never come across a high-quality one. Swapping a part with one from a vehicle known to be functioning properly is a dependable way to test for issues.

An improper ATF level might cause unexpected issues with your gearbox. Inspect the fluid level. At 50,000 miles, you may need further servicing. For a 7G tronic gearbox, the service should be performed after about 40,000 miles or after 4 years.

When was the most recent gearbox maintenance performed and by whom?

It would be beneficial to know the specific automobile model and, most significantly, the kind of engine (petrol, diesel, etc.) you have. "E class coupe" might refer to several things. Check the oil while the automobile is warmed up and parked on level ground. Inspect the oil around 15 minutes after turning off the engine. A mark should be present on the stick to indicate the acceptable level. If the oil level is much higher than recommended, it is considered overfilled. In this case, it is advisable to remove excess oil using the dipstick tube and recheck the level.

I am unable to see any photos in post 3. Should there be one in post 2?

I am using Firefox and able to see images.

Is it necessary to disassociate your old phone beforehand?

I renewed most of the settings, except maps and traffic due to a lack of satisfaction with the traffic feature. Waze on CarPlay offers features that Comand does not provide. I do not feel the need for the most recent satnav maps since I come from a generation that relied on paper maps and can navigate without satnav. Many new drivers rely on the latest maps.

You may clear the error message yourself with iCarsoft. iCarsoft will inform you of the defect before clearing the error message, which may or may not be linked to the battery drain. Alternatively, any independent Mercedes-Benz expert equipped with an MB STAR diagnostic computer may do this task for you.

Apply a little amount of araldite adhesive behind it and secure it with a gentle clamp for 30 minutes, or use a 3-inch x 8 screw.

Recent years have seen diesel oil priced 5%-10% more on average than petrol, which should be considered. For accurate comparison of miles per gallon (mpg), it is important to maintain consistent driving patterns. Diesel engines have a slower warm-up process and are less efficient on short trips, leading to potential expensive Diesel Particulate Filter (DPF) problems. Diesel engines perform best on frequent long-distance motorway or A-road trips.

I would not purchase a Mercedes Benz automobile that is fitted with an AdBlue system. I recommend looking at forums of other vehicle brands to find a similar-sized estate car that complies with EU6 emissions standards without using AdBlue. If that is not possible, consider finding an AdBlue system from a firm known for designing trustworthy systems. To get an EU6 Mercedes, only petrol is suitable. Subjective viewpoint.

I like the intense beginning!

That was my assumption.