If this the car/engine combination I think it is, you will need to have the choke looked at on the carb.

Good luck. You could take off the air cleaner and be sure that it is closing properly.

The choke has to be working for the engine to start in cold weather.

__________________
Benzmac:
Donnie Drummonds
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS