Removing the battery will make your life that much easier, you will struggle big time otherwise especially to undo and re crimp the Clic R hose clamps. Disconnecting the battery wont cause any issues and as you say is a simple re connect after.
Nice rare beast, love the arty photos too ! Revised chain tensioners and pressure check valves need installing in these engines at the earliest even if there are no startup rattle symptoms. Some very early examples even had the old style chains which also are prone to fail.
These engines can leak from the front cam covers down the front of the cylinder heads and into the 4 camshaft sensors wiring loom. Worth unplugging each sensor on the next inspection to see if oil has starting leaking through. Whilst both of these leaks would only account for a small loss in oil...
Doing a simple oil change is as easy as it is on most mercs from the last few decades with the same 13mm drain bolt. As usual takes more time removing the the undertrays !
Your car will have a MB digital service book so something to ensure your Indy has access too if your getting someone else...
See this thread for this particular C36 AMG'S sale history:
Was originally up for sale at £16.5k and im sure this 'popular' current seller paid considerably less.
Leave or message a chassis number that will allow us to look for you based on your VIN and not what the DVLA have it registered as. Also to get the corrections made on your V5C follow this link: