I apologise in advance, old topic I know , my TD6 2003 has suspension inactive on dash , no red light on the ride height adjust knob , checked fuses , in glove box and in boot , can't hear compressor at all . Does this mean compressor replacement or are there other things it could be ?
I've done lock to lock but not worked .

If there are no lights on you have a hard fault, even if you fix the problem it won't work until reset with a diagnostic tool...

The comp won't run as the system has switched off until reset.

No good guessing, get the codes read or buy an IID tool or similar and do it yourself... Pete

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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Cheers Pete

sounds very much like the problem that they had on the wheeler dealers L322. Get the codes read as Pete says then you will know where to start.

I think it was a pressure static when filling fault that they had on the TV, and was down to the compressor failure..... There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
Fiat 500x 1.4 multiair Lounge 2015
2010 LR D4 Commercial 2.7 TDV6