I have a 1987 300E that starts, then if you stop before it warms up good (3-5 miles) it will not start until it cools, does not do this all the time, sometimes it goes for months with out this problem. It is becoming harder to start now also. Sometimes when driving slow or coming to a stop light before it warms up good it cuts off and won't start until it cools, if I drive at highway speeds until it warms up completely it goes all day with no problem. I have changed the cold start valve, the ECU computer, fuel relay, spark plugs, and wires, none of those cured the problem, any suggestions. Thanks, Steve