W211 estate - air suspension problem

[Pauljames]

Car not been used for ages, starts and runs fine, suspension is on bumpstops at the back.

Compressor was not coming on, tested across a battery and wouldn't go - so I've replaced for a new one along with the relay.
Compressor still won't come on when you start the engine or try the test via a diagnostic box.

I've pulled the intake pipe off - so no obstruction, checked the fuse on the side of the dashboard and its ok.....


--- I'm now thinking it could be the control unit? is it worth swapping ? if so where can I find it.....

 

[John77]

I blew a fuse on my airmatic fitting another electrical item, but that fuse was under the bonnet in with the relays. Just a thought. May be worth a look.