Based upon input from other forum members in previous posts, I've decided that the rough cold start/nailing/unburned diesel smoke that my '83 300D is experiencing is due to one or more dirty or clogged injectors. The car has only 126k miles on it, but I don't know if the injectors have ever been serviced and I've ruled out the other usual suspects (valves, glow plugs, etc.)

So, I'm looking for a reputable shop in Houston to do the injector service. There is a Bosch service shop a couple of miles from me (M&D Distributors on Shepherd) that sounds like a good choice, but when I was about to have this work done over the summer I drove the car up there and, while they said they could do the work, from the way they talked ("Yeah, I think we could do this") I got the impression that they mostly service truck diesel engines.

Another possibility is ******** Stuttgart on Antoine. I have read good things about them and have even gone there to purchase a part from them in a pinch once before. They work on Mercedes only, but to my knowledge are not a certified Bosch shop. Last time I was there I asked them if they could clean and test my injectors and they said "yes".

Oh, and I'm limiting this to places here in town because this is my daily driver and I can't afford the extra time it would take to mail them to someone, etc.

So, what should I do? Should I take it to the specialized certified Bosch injector shop that doesn't see many MB diesel cars, or should I take it to a Mercedes-only shop that doesn't necessarily specialize in injectors?