Evening all , the lights on my dashboard for the speedo and rev counter stay illuminated when I turn the ignition off and take the keys out , is there some way to get them off cos I’m buggered if I can find it , it had a new tracker fitted at the weekend and my “colleague “ took it to get done and I’m wondering if he’s altered something to make then stay on , your help would be appreciated cos it’s doin my head in 
When you say…
Stay illuminated, how long for? It’s been a while since I drove a Merc but I believe they stay on for a short period of time after you’ve locked it and walked off to the pub/chippy/whorehouse/Sainsbury’s.