I have noticed that my 1986 300SDL is sluggish in cold weather (below 40 degrees F) and will not accelerate or readily change gears until the car has run for several minutes - after that, the car runs well. What is happening? Is there a switch from a time delay/thermal relay that enables the car to change gears after it warms up?

When I first bought this car used from a dealer, the car would not switch gears at all and remained in low gear during cold weather. I refused to buy it until the dealer fixed the problem. The dealer supposedly replaced a switch in the car and since then the car fuctions well after it warms up - whereas it woudln't switch at all when I got it.

I sent another thread earlier today asking about my 1990 350SDL
because it had been running well and suddenly would not switch gears. Is there a fuse link that enables/disables this lockout function?

Marvin Smith