I have a 1985 500SL with under 80000 miles but not perfect. It always starts fine when cold. Recently when starting warm it acts like it is flooded
and I have to hold the accelerator to the floor. It seemed to be fine after that. Last week however, it started a little harder and the Economy guage on the dash went all the way to the right and stuck there. When idling, it seems to be running a little rough but appears to
run fine when driving. I also noticed a mild tapping when I lift the hood with the engine running. I tried tapping the dash to see if the Economy guauge needle would let loose but no such luck. In the past the needle would always move right when pushing down on the accelerator and return to normal as the rpms leveled off. All the other guages seem to work fine. I assume I have some fuel issue, but am limited mechanically.
Before I take off the air cleaner and do some damage, I would appreciate any help you can give. I may need new spark plugs as well.
Thanks
Bill