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hi all, thanks for the quick responses - to answer some of the questions - - it used to drop at night, but not since the front valve change, so that cured that (i actually changed front legs as well - battery voltage is fine - compressor is the Hitachi one - changed the compressor relay just in...

Hi all, question on the dreaded suspension faults cropping up. got a 2010 D4 HSE, had a few issues with warning lights, and error code C1A18 - pressure increases too rapid when filling reservoir. - i have seen lots of posts that say even when put into dealers they still fail to fix it. i have...