ItsAPU
Member
Hello all. I've been having some airmatic issues with my 2006 CLS500. For context, it's done 113k miles and sadly over winter it sat for a few weeks at a time without usage as I wasn't about. Whilst anticipating issues between 100-120k, all my troubles have come at once.
I noticed a rear arch dropping pretty shortly after turning off the engine, so gathered that I had a leaky airbag; I replaced both rear airbags with Arnott a few months ago and this worked great for about 1,000 miles. Last week, I got the "visit workshop" on the dash and hooked the car up to iCarSoft and it kicked up code 5508 "pressure line system leaks".
I thought the compressor might be cooked if I didn't catch the leak quick enough, so replaced it over the bank holiday with a new one (cheap chinese but the only one available), and also a new relay. This didn't do anything but by this point I was also getting the red "STOP, car too low" and:
5170 - B7 (AIRmatic pressure sensor): Signal failure
5300 - Y36/6 (AIRmatic central reservoir charge valve): open circuit
5350 - A9/1y1 (AIRmatic pressure release valve): open circuit
I waited until Tues and bought the B7 pressure sensor (£60, direct from MB, and is incidentally the same part as for the air con pressure sensor). The car recognised the sensor being plugged in/unplugged as the 049 B7 pressure gave 0 bar and 35 bar respectively, and I tested the wiring and there is power to the sensor. For about 20 seconds and only when jacked up, the compressor did kick in and I heard a hissing from both rear airbags, but the car didn't lift at all. I did get about 1-second of compressor action when I exited and re-entered the AIRmatic menu on the iCarSoft kit. I can see power at each level sensor, and it tells me the accurate level of each corner.
Overall, I've replaced: rear airbags, AIRmatic relay, compressor, compressor filter, pressure sensor, and checked pressure sensor power/fuses and sprayed valve block for leaks.
I haven't replaced: valve block, front airbags, level sensors.
Could it just be that the valve block is the last thing I haven't done and is the culprit? I couldn't source the part over the weekend but otherwise I'm running out of parts to replace!
Any help much appreciated,
Simran
I noticed a rear arch dropping pretty shortly after turning off the engine, so gathered that I had a leaky airbag; I replaced both rear airbags with Arnott a few months ago and this worked great for about 1,000 miles. Last week, I got the "visit workshop" on the dash and hooked the car up to iCarSoft and it kicked up code 5508 "pressure line system leaks".
I thought the compressor might be cooked if I didn't catch the leak quick enough, so replaced it over the bank holiday with a new one (cheap chinese but the only one available), and also a new relay. This didn't do anything but by this point I was also getting the red "STOP, car too low" and:
5170 - B7 (AIRmatic pressure sensor): Signal failure
5300 - Y36/6 (AIRmatic central reservoir charge valve): open circuit
5350 - A9/1y1 (AIRmatic pressure release valve): open circuit
I waited until Tues and bought the B7 pressure sensor (£60, direct from MB, and is incidentally the same part as for the air con pressure sensor). The car recognised the sensor being plugged in/unplugged as the 049 B7 pressure gave 0 bar and 35 bar respectively, and I tested the wiring and there is power to the sensor. For about 20 seconds and only when jacked up, the compressor did kick in and I heard a hissing from both rear airbags, but the car didn't lift at all. I did get about 1-second of compressor action when I exited and re-entered the AIRmatic menu on the iCarSoft kit. I can see power at each level sensor, and it tells me the accurate level of each corner.
Overall, I've replaced: rear airbags, AIRmatic relay, compressor, compressor filter, pressure sensor, and checked pressure sensor power/fuses and sprayed valve block for leaks.
I haven't replaced: valve block, front airbags, level sensors.
Could it just be that the valve block is the last thing I haven't done and is the culprit? I couldn't source the part over the weekend but otherwise I'm running out of parts to replace!
Any help much appreciated,
Simran
