New to the S-Class model, I have researched this forum and found it very helpfull. I would like to know the location of the airpump relay that everyone is talking about for the suspension. My model is a 2002 S 430, any info would be greatly appreciated.
thecuza67
Need info on air pump relay
Hello, welcome to the forum.
The relay is located in the right side fuse box, under the bonnet.
There are two square-looking black relays located about in the middle of the fuse box, (a little bit towards the front direction). The relay is the one wich is closest to the front of the car of the two.
If you pull the relay you should get an airmatic failure message when you start the car. (to check if you found the correct)
Part no on the relay is 0025421319
Vendor is now HELLA, was before Siemens.
You can get it cheap from here:
Your Parts Search Returned 2 Part(s)
Change it asap if you find that the Siemens one is still on the car...
rgds
Odd
The relay is located in the right side fuse box, under the bonnet.
There are two square-looking black relays located about in the middle of the fuse box, (a little bit towards the front direction). The relay is the one wich is closest to the front of the car of the two.
If you pull the relay you should get an airmatic failure message when you start the car. (to check if you found the correct)
Part no on the relay is 0025421319
Vendor is now HELLA, was before Siemens.
You can get it cheap from here:
Your Parts Search Returned 2 Part(s)
Change it asap if you find that the Siemens one is still on the car...
rgds
Odd
I am no mercedes specialist.
Ihave only seens siemens and hella mentioned on the net, but maybe others are also making this kind of relay.
The most important thing i that you know where the relay is located and are able to pull it out if it gets stuck in the ON postition. In the on position the compressor will run all the time even with the ignition off and it will burn out.
Also if compressor starts to run for longer periodes with a good reason to do so (air leak for example) it could be the relay is getting damaged.
I have also heard that the relay could get damaged from and old compressor starting to draw to much current.
Also if you get a major leak in the airmatic system and compressor runs all the time, its possible to pull the relay to save the compressor.
Weather you should change the relay or not depends on how much know the car and its normal behaviour. These relays are the same for all W220 airmatics whatever model.
With about 16$ from autohaus arizon not a big deal to exhange it, but it will not fix that leaky top seal strut problems..
Rgds
Odd
Ihave only seens siemens and hella mentioned on the net, but maybe others are also making this kind of relay.
The most important thing i that you know where the relay is located and are able to pull it out if it gets stuck in the ON postition. In the on position the compressor will run all the time even with the ignition off and it will burn out.
Also if compressor starts to run for longer periodes with a good reason to do so (air leak for example) it could be the relay is getting damaged.
I have also heard that the relay could get damaged from and old compressor starting to draw to much current.
Also if you get a major leak in the airmatic system and compressor runs all the time, its possible to pull the relay to save the compressor.
Weather you should change the relay or not depends on how much know the car and its normal behaviour. These relays are the same for all W220 airmatics whatever model.
With about 16$ from autohaus arizon not a big deal to exhange it, but it will not fix that leaky top seal strut problems..
Rgds
Odd
thanks, for advice odde.
its good to know where it is like you said if needed in emeregency.
so far i don't have problems with compressor. there is one small crack on the left top strut seal though.
i probably will get the new relay together with front brake rotors. just wanted to know if i need to hurry since siemens had problematic relay originally.
its good to know where it is like you said if needed in emeregency.
so far i don't have problems with compressor. there is one small crack on the left top strut seal though.
i probably will get the new relay together with front brake rotors. just wanted to know if i need to hurry since siemens had problematic relay originally.
also new to 220
hi:
have 2000 s430...previously owned 126s (3x)
I am in third year...love this car...replaced shocks with ARNOTT rebuilds...fantastic ride (and relay of course)...pump still good
need help with following please:
passenger side wiper stopped working on trip this week....would come up and not return...removed arm assembly from car to arrive safely in Toronto
Center pivot turns but right one can be spun with finger pressure.
I peeked under plastic moulding at base of windshield and saw a white/grey pot metal cast box from which wiper pivots protrude...is this what I need to replace? what is part number? Am I on right track?
thanks for help
glenn g
montreal, qc
hi:
have 2000 s430...previously owned 126s (3x)
I am in third year...love this car...replaced shocks with ARNOTT rebuilds...fantastic ride (and relay of course)...pump still good
need help with following please:
passenger side wiper stopped working on trip this week....would come up and not return...removed arm assembly from car to arrive safely in Toronto
Center pivot turns but right one can be spun with finger pressure.
I peeked under plastic moulding at base of windshield and saw a white/grey pot metal cast box from which wiper pivots protrude...is this what I need to replace? what is part number? Am I on right track?
thanks for help
glenn g
montreal, qc
It is important to understand that even after you change your relay to the Hella brand, you still need to change it again later at regular intervals. These parts dont last forever. My 1st Hella relay was replaced after 40,000 km. I travel on uneven and potholed roads so your relay may last longer. Everything is fine now.
I changed mine after 40,000 km. There is a significant change in ride quality after the change. I drive generally on really bad roads, potholed and uneven for about 250 km at leats once to twice a week. I am going to make my next change at 30,000 km because the relay is cheap.
My current HELLA relay is MADE IN CHINA. The previous HELLA relay that i had was MADE IN SPAIN. The original relay the car came with was the Siemens one. It caused my pump to burn out.
I realized i needed to change my HELLA relay again when the ride was inconsistent. Sometimes the ride was firm and smooth and sometimes the ride was soft over the same stretch of road (setting of suspension remained the same at the first setting).
The relay is really important and since its so cheap, i think everyone should change theirs regularly before it causes the pump to burn out.
At first i thought the relay had gone bad because i had a leak but i have done the soapy water test to the upper and lower seals and everything seems fine. Even after leaving the car for a few days without driving, it hardly drops. My conclusion is that the relay needs to be changed just like most parts of a car because of wear and tear. It doesnt last forever.
The conclusion applies in the case of the pump. Even if you do not have a leak, im sure the pump needs to be changed at regular intervals. When? I havent found out yet. Will let everyone know when it happens!
My current HELLA relay is MADE IN CHINA. The previous HELLA relay that i had was MADE IN SPAIN. The original relay the car came with was the Siemens one. It caused my pump to burn out.
I realized i needed to change my HELLA relay again when the ride was inconsistent. Sometimes the ride was firm and smooth and sometimes the ride was soft over the same stretch of road (setting of suspension remained the same at the first setting).
The relay is really important and since its so cheap, i think everyone should change theirs regularly before it causes the pump to burn out.
At first i thought the relay had gone bad because i had a leak but i have done the soapy water test to the upper and lower seals and everything seems fine. Even after leaving the car for a few days without driving, it hardly drops. My conclusion is that the relay needs to be changed just like most parts of a car because of wear and tear. It doesnt last forever.
The conclusion applies in the case of the pump. Even if you do not have a leak, im sure the pump needs to be changed at regular intervals. When? I havent found out yet. Will let everyone know when it happens!
hey guys i need help please.....i have 2002 w220 s430...my car have airmatic problem just slam in ground all 4 wheels...in to fender,i change relay O" and relay N" 2 days ago...but still no luck,today i change the pump compressor still no luck...i don't know what the causing the car not going up,i have the litle crack in my top black plate sturt,do you thing that causing it.i don't go to dealer yet.cause i am running out money,just having the baby.so do you thing the new relay is going bad again,cause still a touching with old compressor ?....in last 2 day...so do thing i have to change new relay again or what ?....i don't hear compressor running or making sound at all right now.help pleaseeeeeee ASAP.
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