Sent my C200 in for diagnostic check {engine light was coming randomly then going out again after a few hours or even days.
Now it's got 'DIAGNOSTICS' stuck on radio screen, can't get rid of it, even with the car swtched of it stays on.

 

Disconnect the battery

 

Maybe, cleared itself after 3 days. By the way, the fault on diagnosis was 'exhaust camshaft timing'. Fault was cleared and is ok now. Had thecamshaft sprockets and chain replaced 120000km ago, it's on 44500km now.
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