Khalil Yassine

Hey guys. So I recently purchased an 08 W211 E350 Sport with 83k miles that had a light front impact and fixed it up.

I'm having an issue where there's absolutely zero steering assist, even while driving, it's like the car is off. I noticed that the power steering cooler (shown in the picture) was crimped so I replaced it with a new one and refilled new fluid in thinking that would fix the issue, but it didn't, the steering still feels like the car is off.

Any idea where I should start. I'm starting to think the motor or the pump is dead due to fluid starvation, but it never worked from the start anyway.

Im new to the newer Mercs, so help me out here

kjb55

It's possible your car has parametric steering (option code 213). It's a speed sensitive assistance power steering. You can determine if you have it from your VIN, or looking for the servo motor on the rack. It's possible that the wiring was damaged and it's not getting the correct signal to provide more assist at slower speeds and less at higher speeds.

Khalil Yassine

Interesting. I'll call the dealer tomorrow to see if my car has that option.

Shouldnt I get codes on the screen if something is broken?

Also I cant find the OBD2 port in the car, where is it located?

rapidoxidation

There's a build code sticker under the hood, right in front of the radiator if I remember correctly. It's got 3 digit numbers in rows and columns.

The OBDII port is under the dash, kind of above your left knee just in from the driver's side door. Might be a little red door that snaps open to access it.

Khalil Yassine

So just confirmed tonight that the steering pump was dead. Oh well. Found a new one in almost new condition on Ebay. Will update as I progress. Hope this thread helps others.

Khalil Yassine

All fixed up, thanks for the help anyway guys! The pump was dead and that was the issue. If you have the same problem, check your pump.