F1_Nor

I purchased a pre-owned W205 C300 last June. It had very low mileage and it was fully loaded.

Since pretty much day one, the tire pressure sensor screen indicates that the left rear pressure is low.

I didn't think it was a big issue because I would inflate it with a portable kit once every 3 weeks or so.



I don't know if it is from the tires or the rim.

A week after I purchased the car, I went to see them about the front plate bracket installation, and they only inflated it without fixing it.

There are a couple scratches on the rim, but it does not look too noticeable, does anyone have a similar problem?

And is there a was to see the log of the car to see if this was happening before I got the car?

removedCFGaccount

It very likely has been patched.

Sam Manuel

Put air in my tire about 3 times in a week until I just accepted that it's got a hole somewhere lol I think they charged me 30$ to fix it .

Took less than 30 minutes

gfmohn

Same here. A few months after I got my previous W203 C280 (see below), I noticed a wheel looked soft, and it was a few pounds low. As a 2007 model, it had no air pressure sensors of any kind, but I have always checked my air pressures regularly. I found I was putting in a few pounds every 3-4 days. After a couple repeats of this, I took it in. The tire had a nail in it! The nail was small and in a groove, the grooves were new and deep, and it was a rear wheel. So the nail was almost impossible to see with the wheel on the car. The dealer plugged the leak for $40.

With a strong light and maybe a good mirror, you MIGHT spot a nail or other object. Then you would still have to take your car in to repair the tire. If a puncturing object cannot be found, you have to get a new tire. And now, you may have to get the new tire shaved to match the circumference of the other tires. Everybody tells you that tires are important for gas mileage and critical for safety. What are you waiting for?

RemmyZero

I ended up in a situation recently where I was filling my tire every day. Turned out my rim was cracked on the inside where the tire was set into the rim so it was a slow-ish leak that you couldn't diagnose just by looking at the exterior. My case is probably more extreme than yours but if you're a do-it-yourself type of guy pull the rim off and inspect it thoroughly, otherwise bring it to the dealer and they can put it in a tub of water or use snoop testing to look for air leaks.