Airmatic pump question and issue
04-14-2019, 08:05 AM
#1
Member
Thread Starter
Airmatic pump question and issue
Hi, I know this issue mentioned several time but I wish to explain what happen with me.
From several days I notice that the pump may rise the car smoothly and sometimes didn't rase it or need couple engagement to raise it so when I turn on the switch the pump turned and the notification at the cluster shown but after a 2 minute the pump turned off while the car didn't raise to its level and the notification still at cluster, later on may the pump function normally. I have searched a lot, the issue maybe the relay, fuse or something block between pump and vale or valve issue.
I check the relay and it is tyco model nor hella neither simens. I checked the fuse(32 slot) it is look like not bad but I have purchased used Simens relay and new fuse, on the way when I was returning back to home (before replacing the parts) I engaged the pump and everything was fine but when I was in the parking the issue toggles again. I Parked the car and replace the relay after push raise button the issue still the same but after replacing the fuse and raise again the car, the car raised up in 1 minute 12 second after that the pump turned off and notofication at display disappeared after test it several times in the parking everything is fine but does that mean the issue in the fuse and does the fues make this issue? Or may I face the issue again and what could be the issue?
From several days I notice that the pump may rise the car smoothly and sometimes didn't rase it or need couple engagement to raise it so when I turn on the switch the pump turned and the notification at the cluster shown but after a 2 minute the pump turned off while the car didn't raise to its level and the notification still at cluster, later on may the pump function normally. I have searched a lot, the issue maybe the relay, fuse or something block between pump and vale or valve issue.
I check the relay and it is tyco model nor hella neither simens. I checked the fuse(32 slot) it is look like not bad but I have purchased used Simens relay and new fuse, on the way when I was returning back to home (before replacing the parts) I engaged the pump and everything was fine but when I was in the parking the issue toggles again. I Parked the car and replace the relay after push raise button the issue still the same but after replacing the fuse and raise again the car, the car raised up in 1 minute 12 second after that the pump turned off and notofication at display disappeared after test it several times in the parking everything is fine but does that mean the issue in the fuse and does the fues make this issue? Or may I face the issue again and what could be the issue?
04-14-2019, 09:48 AM
#2
Junior Member
I'd start by scanning for fault codes first to possibly steer you in the right direction. Could be something simple such as a sensor acting up.
04-14-2019, 10:02 AM
#3
MBWorld Fanatic!
There are several possibilities...
- There appears to be a leak in the system - otherwise, the car would not be lowering. This means that the compressor is working much harder and longer than usual, greatly increasing the wear on the compressor.
- The wear on the compressor has reduced its output, so it has to work even longer to bring the car back to its normal ride height. This increases the wear.
- The Airmatic control computer limits the run time on the compressor, so as to reduce the chance of burning it out. The increases the time needed to bring the car to its normal ride height.
In most cases, the most economical repair is to rebuild the compressor. There is a single piston, with a single piston ring, made of a special plastic material. You can buy a kit online fairly cheaply that includes the piston ring, seals, etc. Removing and rebuilding the compressor is within the abilities of a competent do-it-yourself owner. The Wabco compressor is used on many different vehicles, not just Mercedes, and the kits are available worldwide from numerous vendors. There are numerous videos online, showing how to rebuild the compressor.
Or, you might find a functional used compressor in a wrecking yard or online. Or, you can buy a new compressor. Or, you can go to a Mercedes dealer and get the problems fixed for about half the value of your car.
There are numerous threads on this forum and the Benzworld forums concerning the problem. There are a lot of things that you should do while you are doing the compressor repair, such as checking the system's air inlet filter hose, the dessicant, etc.
Sooner or later, you will need to repair the leak.
Search and reading are your friends...
- There appears to be a leak in the system - otherwise, the car would not be lowering. This means that the compressor is working much harder and longer than usual, greatly increasing the wear on the compressor.
- The wear on the compressor has reduced its output, so it has to work even longer to bring the car back to its normal ride height. This increases the wear.
- The Airmatic control computer limits the run time on the compressor, so as to reduce the chance of burning it out. The increases the time needed to bring the car to its normal ride height.
In most cases, the most economical repair is to rebuild the compressor. There is a single piston, with a single piston ring, made of a special plastic material. You can buy a kit online fairly cheaply that includes the piston ring, seals, etc. Removing and rebuilding the compressor is within the abilities of a competent do-it-yourself owner. The Wabco compressor is used on many different vehicles, not just Mercedes, and the kits are available worldwide from numerous vendors. There are numerous videos online, showing how to rebuild the compressor.
Or, you might find a functional used compressor in a wrecking yard or online. Or, you can buy a new compressor. Or, you can go to a Mercedes dealer and get the problems fixed for about half the value of your car.
There are numerous threads on this forum and the Benzworld forums concerning the problem. There are a lot of things that you should do while you are doing the compressor repair, such as checking the system's air inlet filter hose, the dessicant, etc.
Sooner or later, you will need to repair the leak.
Search and reading are your friends...
The following users liked this post:
pierrejoliat (04-14-2019)
04-14-2019, 10:35 AM
#4
Member
Thread Starter
There are several possibilities...
- There appears to be a leak in the system - otherwise, the car would not be lowering. This means that the compressor is working much harder and longer than usual, greatly increasing the wear on the compressor.
- The wear on the compressor has reduced its output, so it has to work even longer to bring the car back to its normal ride height. This increases the wear.
- The Airmatic control computer limits the run time on the compressor, so as to reduce the chance of burning it out. The increases the time needed to bring the car to its normal ride height.
In most cases, the most economical repair is to rebuild the compressor. There is a single piston, with a single piston ring, made of a special plastic material. You can buy a kit online fairly cheaply that includes the piston ring, seals, etc. Removing and rebuilding the compressor is within the abilities of a competent do-it-yourself owner. The Wabco compressor is used on many different vehicles, not just Mercedes, and the kits are available worldwide from numerous vendors. There are numerous videos online, showing how to rebuild the compressor.
https://www.amazon.com/Mercedes-SUSP.../dp/B00U53OC60
https://www.youtube.com/watch?v=rMfw2Sbjtbs
Or, you might find a functional used compressor in a wrecking yard or online. Or, you can buy a new compressor. Or, you can go to a Mercedes dealer and get the problems fixed for about half the value of your car.
There are numerous threads on this forum and the Benzworld forums concerning the problem. There are a lot of things that you should do while you are doing the compressor repair, such as checking the system's air inlet filter hose, the dessicant, etc.
Sooner or later, you will need to repair the leak.
Search and reading are your friends...
- There appears to be a leak in the system - otherwise, the car would not be lowering. This means that the compressor is working much harder and longer than usual, greatly increasing the wear on the compressor.
- The wear on the compressor has reduced its output, so it has to work even longer to bring the car back to its normal ride height. This increases the wear.
- The Airmatic control computer limits the run time on the compressor, so as to reduce the chance of burning it out. The increases the time needed to bring the car to its normal ride height.
In most cases, the most economical repair is to rebuild the compressor. There is a single piston, with a single piston ring, made of a special plastic material. You can buy a kit online fairly cheaply that includes the piston ring, seals, etc. Removing and rebuilding the compressor is within the abilities of a competent do-it-yourself owner. The Wabco compressor is used on many different vehicles, not just Mercedes, and the kits are available worldwide from numerous vendors. There are numerous videos online, showing how to rebuild the compressor.
https://www.amazon.com/Mercedes-SUSP.../dp/B00U53OC60
https://www.youtube.com/watch?v=rMfw2Sbjtbs
Or, you might find a functional used compressor in a wrecking yard or online. Or, you can buy a new compressor. Or, you can go to a Mercedes dealer and get the problems fixed for about half the value of your car.
There are numerous threads on this forum and the Benzworld forums concerning the problem. There are a lot of things that you should do while you are doing the compressor repair, such as checking the system's air inlet filter hose, the dessicant, etc.
Sooner or later, you will need to repair the leak.
Search and reading are your friends...
04-14-2019, 05:31 PM
#5
MBWorld Fanatic!
"Thanks a lot for you response, but why there is a leak"
Because you told us, "From several days I notice that the pump may rise the car smoothly and sometimes didn't rase it or need couple engagement to raise it so when I turn on the switch the pump turned and the notification at the cluster shown but after a 2 minute the pump turned off while the car didn't raise to its level..."
If there was not a leak, the car would not be lowered.
No, the fuse or the relay is not likely to be the cause of your problem.
Because you told us, "From several days I notice that the pump may rise the car smoothly and sometimes didn't rase it or need couple engagement to raise it so when I turn on the switch the pump turned and the notification at the cluster shown but after a 2 minute the pump turned off while the car didn't raise to its level..."
If there was not a leak, the car would not be lowered.
No, the fuse or the relay is not likely to be the cause of your problem.
04-15-2019, 02:21 AM
#6
Member
Thread Starter
"Thanks a lot for you response, but why there is a leak"
Because you told us, "From several days I notice that the pump may rise the car smoothly and sometimes didn't rase it or need couple engagement to raise it so when I turn on the switch the pump turned and the notification at the cluster shown but after a 2 minute the pump turned off while the car didn't raise to its level..."
If there was not a leak, the car would not be lowered.
No, the fuse or the relay is not likely to be the cause of your problem.
Because you told us, "From several days I notice that the pump may rise the car smoothly and sometimes didn't rase it or need couple engagement to raise it so when I turn on the switch the pump turned and the notification at the cluster shown but after a 2 minute the pump turned off while the car didn't raise to its level..."
If there was not a leak, the car would not be lowered.
No, the fuse or the relay is not likely to be the cause of your problem.
The following users liked this post:
redaotrosh (04-15-2019)
