I am new to this forum seeking the answers to same 300E problem as a lot of you are experiencing.
i.e Intermittent engine stall at low revs.
my local Mercedes specialist here in the UK has now had it 4 times and despite their best efforts, the fault always returns.
What I can rule out is :
Replacing all fuel injectors, done first
replacing the metering head.
I have called a halt to the repair process and am undertaking my own research on fine forums like this before I part with more hard cash.
I wonder if other peaople have become like me an expert at driving an automatic with 2 feet, braking with the left while maintaining 5-10K revs with the right.
I favour the ideas of the fuel injection treatment, then checking for air leaks in the manifold inlet. I will post any progress I make.