1st of all, thanks for having this forum out there.

Let me add that I am a DIY person and have been working on my own cars ever since my father allowed me to crawl around under the car with him at about 2 years old. I've always felt I can do just about any job with the right tools and instruction.

Where I get into trouble or frustration, is when it comes to troubleshooting some issues as cars become more and more technically advanced. I'm more of "vintage" engine guy so to speak.

I'm currently building a new garage that will be what I think is a DIYer's dream complete with a lift and everything. As such, I won't have a space to do my own work out of the weather until about mid-October.

Here's my issue:

When I got my 300SE about a year ago, the previous owner had it inspected and had a laundry list of things the Mercedes dealer said needed to be addressed. One of these items was a set of fuel injectors.

The leaking injectors were causing a flooding problem making the car hard to start and seemingly causing a studdering/bogging issue when starting out. Luckily, I found a set of new OEM replacements on Ebay for about $25 each.

Two weeks ago, the car quit on me at speed with the cruise set. It would start right back up but intermittantly stop time after time. As I was on a trip out of town and about an hour from my house, I ended up having it flat-towed to the dealer because I didn't have the time nor patience to try and work on it on the side of the road.

The dealer replaced the fuel pump (which was the main problem) and filter and they were kind enough to replace my injectors for me with the ones I had with me in the car already. Of course as any DIY person knows, trips to the dealer are feared and seldom cheap. This one cost me $790 (not including the $120 tow).

Since having that work done, there are two issues I am still having. I made a six-hour round trip the next weekend and after getting back, the car sat for a day and then would not start. It turned over just fine but would not fire. It took several attempts without so much as a "pop" and then just started up like nothing was ever wrong. That has only happened once and seems to be starting fine for the last week.

The other issue (which I thought was related to the bad injectors) is that it stutters or bogs down when I hit the gas too fast or hard from a start. If I try to hold the gas on to "clear its throat", it will continue to spit and sputter. If I ease into the gas, it seems to take off smoothly...it's only when I hit it harder that it bogs down to a point where if I continue this, it will die altogether. It doesn't do this ALL the time, but most of the time.

It also does not seem to have any problems at speed if I need to press hard on the gas and engage the passing gear.

Details:
91 300 SE
168K miles, gasoline engine
new cap, rotor, plugs and wires (3 weeks old)
Regular oil and filter changes (Mobile synthetic) every 2000 miles
The aforementioned new Injectors, new fuel pump and filter.

Any ideas? any more information needed?

Thanks Everyone.