I removed the 8 holding bolts ( 10mm ) but cannot remove the valve cover. Use a rubber mallet and tap it all round but it would not budge. Put a scraper underneath the gasket and it will not pry open. Something is holding on to it but I cannot figure out what and how. Feel like it is still lock in position. Do I need to turn the engine to unlock something inside the valve cover. I am completely stumped.

Any ideas please?

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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.