[P6tu]

Hello,

Can someone show me or tell me, where does this line run? I've heard that it is also somewhere inside and not only outside. Why I'm asking, is that I plan to add an additional air compressor to the back of the car to have a quicker lifting of the car when adjusting the level and to ease the life of that original compressor (I have replaced it twice already and now a third one - not chinese - is starting to go). There is plenty of room around the air pressure reservoir at the back and also inside the rear fenders. I'd like to know, where would be the best place to install the splitter for the air pressure line between the valve block and reservoir and I would prefer to add the extra compressor inside to avoid any dirt and other strange things entering the compressor.
Additionally, could anyone tell me the common pressure that is held in that reservoir? I've seen 11-12 bar there, but is that something like a max or is that what should be the common pressure? Right now, in my reservoir it is around 6-7 (winter, slight below freezing temperatures)...

With regards,
P6tu

 

[StenoPete1911]

Hello,

Can someone show me or tell me, where does this line run? I've heard that it is also somewhere inside and not only outside. Why I'm asking, is that I plan to add an additional air compressor to the back of the car to have a quicker lifting of the car when adjusting the level and to ease the life of that original compressor (I have replaced it twice already and now a third one - not chinese - is starting to go). There is plenty of room around the air pressure reservoir at the back and also inside the rear fenders. I'd like to know, where would be the best place to install the splitter for the air pressure line between the valve block and reservoir and I would prefer to add the extra compressor inside to avoid any dirt and other strange things entering the compressor.
Additionally, could anyone tell me the common pressure that is held in that reservoir? I've seen 11-12 bar there, but is that something like a max or is that what should be the common pressure? Right now, in my reservoir it is around 6-7 (winter, slight below freezing temperatures)...

With regards,
P6tu

Hello. The Gl class AIRMATIC system is setup in two ways. If you have the DIESEL engine, then your AIRMATIC tank is directly on the compressor and your lines split off from the valve block.

If you have the GAS engine, then your compressor feeds the AIRMATIC tank which is located in the rear trunk area. Where the spare wheel is, under the coverings.

Your compressor shouldn't go bad that fast, but it seems there is something else going on, on your end. Could be electrical/shorting itself out. Another thing it might blockage of the air feed pipe that is attached to the air filter, which runs up the front right fender. Inspect that first before you add an additional compressor. Also, not all compressors are created equal. Go with a good aftermarket or OEM. Any codes in the car or modules?

I have the compressor from Arnott and it's working like a champ. Spring/summer/fall/winter, no issues or hesitations.

Website, www.fcpeuro.com has lifetime warranty on all their parts. If you're keeping the car, it's a worthy investment. I'm just a customer that buys from them and I am very happy with their support and warranty coverage. GL.

 

[P6tu]

Hello,

I have the diesel engine and the airtank (reservoir) is at the back under a cover. So I know the location of the airtank. I just would lime to see some drawings or some explanation, where the air line from the valve block to the airtank is going (to avoid chasing it with unnecessary disassembly).

I do have a diagnostic device and I do have fault codes under the airmatic submenu. One is that filling of an airtank takes too long and another is related to a bad ads valve at the right rear shock (switches the car to sport mode untill next start).

I have replaced the filter for air intake for the compressor (top of the right fender above the wheelwell cover).

Some additional info from my side:

• all four airbags have been replaced (front ones with shocks)
• the valve block has been replaced
• the compressor has been replaced (twice, first time with chinese, second with factory AMK product - will get it replaced under warranty)
• the relay for compressor has been replaced
• the airfilter at the hose in compressor air intake has been replaced.
• Lifting the car from 0 to lvl1 takes 45-60 seconds
• lifting from 1 to 2 about two minutes
• from 2 - 3 about 4 minutes (and that is too long in my opinion)
• the car does not drop or get lower when standing over a week (no leaks is the airbags)
• I've seen the pressure drop to zero in the airtank/reservoir while the car is not working, but no changes in the car level (just when starting the car, the compressor starts immideatly to pump air.

What should be the pressure in the airtank at all?

With regards,
P6tu

 

[StenoPete1911]

Hello,

I have the diesel engine and the airtank (reservoir) is at the back under a cover. So I know the location of the airtank. I just would lime to see some drawings or some explanation, where the air line from the valve block to the airtank is going (to avoid chasing it with unnecessary disassembly).

I do have a diagnostic device and I do have fault codes under the airmatic submenu. One is that filling of an airtank takes too long and another is related to a bad ads valve at the right rear shock (switches the car to sport mode untill next start).

I have replaced the filter for air intake for the compressor (top of the right fender above the wheelwell cover).

Some additional info from my side:

• all four airbags have been replaced (front ones with shocks)
• the valve block has been replaced
• the compressor has been replaced (twice, first time with chinese, second with factory AMK product - will get it replaced under warranty)
• the relay for compressor has been replaced
• the airfilter at the hose in compressor air intake has been replaced.
• Lifting the car from 0 to lvl1 takes 45-60 seconds
• lifting from 1 to 2 about two minutes
• from 2 - 3 about 4 minutes (and that is too long in my opinion)
• the car does not drop or get lower when standing over a week (no leaks is the airbags)
• I've seen the pressure drop to zero in the airtank/reservoir while the car is not working, but no changes in the car level (just when starting the car, the compressor starts immideatly to pump air.

What should be the pressure in the airtank at all?

With regards,
P6tu

Hello. From what I'm seeing is that your compressor is unable to keep the pressure in the system. That error that says, 'takes too long' it's automatically your compressor. You don't have air line leaks because your car does not drop on any corner. The reservoir tank will drop to low or zero, for safety reasons, if not regulated within a certain timeframe. The compressor has a tank on itself, which feeds the valve box, and the reservoir tank. The air compressors do go bad, so it might have been just pure luck that you got a bad one from an OEM mfr.

Go to, Contact Arnott | Arnott Industries and call them and they will have the PSI specs that you're looking for. GL.