Do I Have Cruise Control In My 400E?
 

I bought this 92 400E 1 month ago, the cruise control hasn't worked since then.

I looked under the hood, couldn't find the actuator, I got the service CD, it seems that actuator should locate on the engine block near the power steering fluid reservoir, my car doesn't have it there.

I also know the actuator should be connected to the throttle through a cable, I checked my throttle body, there is a cable behind the engine but I guess it's from the gas pedal, there is arm nearby, but no cable attaches to it.

From the above information, can you tell if I have cruise control in my car or not? I have that control stick in my steer column.

Thanks.

D. J

The cruise control actuator and throttle body are one unit in your car.

Haha!!

Guess what happened, I found out the Fuse "F1" on one of the computer modules in the computer box was burnt.

Replacing it with a 10 Amp solved Cruise control problems, besides that it fixed my ABS problem, and also my engine rpm can reach 6000 if I kickdown, before it bogged down as soon as it reached 5000.

I just got the service CD yesterday, from the schematic, it seems that 10 A fuse "F1" is used to protect the ABS circuit and Cruise control/Accelerator.

Today I had to handover this 400E to my wife, I bought this car for her, after I fixed these three problems by just replacing a fuse, I no longer have excuses for not letting her to drive it, since it has become a perfect car.

After I drove my sluggish Explorer to work, I decided I will buy another old Mercedes for myself.

Glad you found the problem. You should have mentioned all of your problems in the post because I had a very similar problem with my friends 94 S420. He had all of the problems you mentioned plus his ODO was working. It turned out to be one of the three 10amp fuses in the computer box.