190e does not start on first try
 

My 1990 190e 2.6 does not always start on the first try especially in the morning. When it is warmed up it will start on the first try but I have to crank the ignition more than normal until it starts. I just bough the car and it has 80K miles. There is also another slight problem that occurs. When I am shifting from reverse to drive like when I do "K" turns the idle drops a bit lower than normal and it is on the verge of stalling. Can the two problems be related. Otherwise it drives like a brand new car.

my 300E does the same thing. Anyone have any ideas what can it be?
Thanks

The emission certification test cold start is begun after soaking the car at 70F for at least 12 hours. Because about 80 percent of emissions are generated during the first two minutes of the test, the OEMs calibrate a 70F cold start on the ragged edge of leaness, which can cause the car to start and die.

Most may notice that their CIS-E equipped cars cold start much better at less than 50F.

One way to mitigate the problem is to adjust the duty cycle (search archives if you don't understand this term or how to adjust) to below 50 percent at idle. The max differential between idle and 2000 rev duty cycle is specified at ten percent, so if you adjust the idle duty cycle to average about 45 percent (slightly rich) it will probably be about 55 at 2000, which is okay.

Duke