1sthemi

So my vehicle isn't throwing any codes out but my rear sags a little less than the front. I've switched out air pumps and shocks but car is still at same height. I was reading a thread the had to do something with the valve block so I decided to try something.

I replaced one of the front tires air line and switched it to the rear tire that had the sag. Surprisingly the car stood tall.. and very tall at that , but the now the front was in the ground (maybe because of sensors or something). But now seeing the vehicle has raised in the rear lets me know that it wasn't the shocks or maybe not even the rear height sensor.

What are you guys thoughts?

Diesel Benz

My thoughts are: either a bad rear level sensor (or attachment) or bad level adjustment (via Star). You might also have a bad valve block.

Why don't you have the car properly diagnosed before throwing in new parts?

1sthemi

Seriously I tried that's why I gave up for a while Mercedes wants me to buy parts that I may not need that are pricey, he said he wasnt that sure so i left there with a Misdianogstic , another time took her to a certified foreign repair shop two weeks in and still came out sagging! I'm somewhat of a mechanic but never wanted to touch my w221 but over time on repairs I've spent AlOT of money with Benz to do simple work I can do. Recently I had to replace the shock and pump as theyWERE damaged. I replaced them hoping for a level vehicle but she's back to sagging.... So that's what's brings me here!

As you stated I also think its one of the three so I should be able to pin point my problem soon !