I have a 91 300E (85K miles) that after driving for a while and coming to a stop it will shake (like it is about to shut down) but it recovers immediately. Drive a few more blocks and come to a stop light same symptom. During summer of last year the following were replaced:
EGR by an indie
spark plugs (Bosch HD)
wires (Beru)
distributor & cap
OVP
air filter
fuel filter

I am not sure about idle control valve as being a cause of this problem. If it is I have no idea where it's located. If someone can point the location I will take it out and clean it. Any other ideas will be appreciated.