Bordenr

Hello can anyone help I have a 2011 E550 have a problem with the airmatic getting no power to the compressor the compressor was changed the right rear airbag was changed that was the start of the problem it was leaning all the fuses are good the relays are good but I still get no power for the car to pump up now all it does is says pull over vehicle too low has any one had this issue

ItalianJoe1

You say the relays are good, so you have no power coming to the compressor relay? What about at the big 40 amp fuse for the compressor?

Bordenr

On the fuse sheet it only shows #12 # 67 for the airmatic the big 40 amp you're speaking about where is it I will check it I don't know the location, I checked a large 40 amp fuse that said engine electronics it was also good

ItalianJoe1

K67 relay is in the trunk, left side, next to the aluminum air storage tank. MB says to replace them whenever you do the compressors, because as the compressors fail they draw too much power and overheat the relay.

The fuse is in the front underhood box (the jump starter point on the right side strut tower, near the battery). It is fuse f160 or f162 depending on your options, if you supply a VIN I can confirm, but it's actually a 60 amp on that vehicle, I was assuming a 40 like the SUV's have.

That diagram is a sideways drawing of it, it's actually tucked down in the bay, you would have to raise it up and remove the cover to check the fuse itself. I would check power at terminal 30 of the relay to confirm the fuse is good. It's the big red wire, well one of two.

The attached PDF has a cutout from the wiring diagram, F32 is the fuse box, A9/1 is the compressor.

Bordenr

This is the vin

Bordenr

Mine look like this

Bordenr

The foes I actually checked was 12 a d 67 I was typing 67 and didn't realize it was 68

ItalianJoe1

Right, you'd have to pull that unit up to get to the fuse in question, easier to pull the relay in the trunk, left rear side, and verify that you have power at terminal 30, see the PDF file for pin locations if it's easier. It will be hot all the time if the fuse is good, if not, then remove that fuse box and check the one shown.

Bordenr

Terminal 30 on my fues chart has no power with the ignition on or off I'll try to remove that cover on the passenger side

ItalianJoe1

I mean terminal 30 of the airmatic relay, in the trunk.

Ungarisch

After completely draining the air system, for the compressor to start back again the car MUST be on the ground, the Airmatic will not start the pump until it has detected the level sensors/wheels are on the ground.

When I replaced my distribution solenoid block, i obviously had to drain all air out. Once I was done with the work, car still up on jack stands, I started it up and the compressor would not turn on. Almost pooped my pants. I then put the car on the ground, with suspension fully collapsed and the pump kicked in as soon as I started the car.

They say you need a star diagnostic to refill the system, but not in my case. The pump started filling as soon as I started the car with it on the ground. Also the pump's overheating protection will kick in, so it will take about 2-3 cycles to full fill the system again. If the pump stops filling mid-way, don't worry. Turn it off, wait 15 minutes, turn it back on and it will continue to fill. Again, take 2-3 cycles if completely drained.

Bordenr

I have been trying to pull that front terminal up where you said to check does the battery have to come out , I have it loose it come partially up I see wires but can't get to them . I not seeing any power to the trunk

Bordenr

I have been trying to pull that front terminal up where you said to check does the battery have to come out , I have it loose it come partially up I see wires but can't get to them . I not seeing any power to the trunk

konigstiger

See attachment.

Bordenr

The other picture were uploaded from post prior they're not in my photos
I did take it out , I will refer back to the pdf here is what I had,

konigstiger

Check pin as shown in wiring diagram to gray compressor relay (k67) located beside bracket in post 15 photo. No power, move on to f160, f162 @ front prefuse box.

Bordenr

I removed a pre fuse Box and did not locate another relay I did not however take off the battery of plate did I need to go further down , when I didn't see the relay I put it back

Bordenr

I changed the pre fuse box the compressor did start the air line blew off and it stopped, I'm getting power to the relay the fuses are good but not turning on anything else I can try

Bordenr

Thank you for your help but I need more help , I changed my pre fues box as instructed I got the compressor to work the car lifted , however it still was leaning on the passenger side what happened now
I took the car to Mercedes they said the airline was leaking , I was willing to replace it but they wanted to replace the entire rear for a single airline so I declined the repair , they brought the car back up and I left I notice that the car was not pumping up like when I brought it to them , now i have power to the compressor but its not pumping anything else I can try to get the compressor to start back pumping the fuses and relay all have power HELP PLEASE !!
I cant get the car back in the garage.

mariohjr94544

Left side only 60amp fuse is out. Where can I buy the replacement?

CaliBenzDriver

These fuse links are not popular... that neans few new sales but plenty of good used one available!!


Have you checked with:

• ECS Tuning
• eBay
• local salvage yards

These heavy links don't die for no reasons... a short circuit or extreme currents.

mariohjr94544

Yup, the cheap chines made air pump fried my connector and wiring. I'm surprised that the relay kept feeding power.
Anyway, i've ordered some fuses that are close to the dimensions and i'll figure out a way of making it work.

Thanks, much appreciated.