First thing...cold start injector has little OR nothing to do with HOW the engine runs when COLD in the "summer"..even at 70F that injector MIGHT spray for 1-2 seconds ONLY with the key to the start position..once the starter is DIS-engaged the cold start does nothing!

IF the engine doesn't run properly when cold there is another problem..LIKE valve adjustment..OR excessive carbon on the valves..OR fuel pressure bleed-off.

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator