Mercedes m111 engine firing order problem and rough idle

SOURCE: engine rough in low idle

I would start by replacing your automatic air intake and throtle body sensor. Check these 2 things out and let me know.

tepfy

SOURCE: My 1995 S500 Mercedes Benz is idling very rough.

before you spend any more money on your vehicle run a cylinder compression test. I know it seems unlikley with less than 100,000 miles but 119 engines do like to burn valves. the LH fuel injection system was only used from 93-95. LH is a germen abreviation for hot wire mass airflow. The later systems use a hot film. Your vehicle has electronic fuel injection so why did you have the fuel injecters pressure cleaned. unless you have the cis system which means your car is not a 95. Motor mounts are also a very common failure on that vehicle. In any event rule out the worst case and perform a compression test because it really sucks to spend alot on an engine and find out it needs a valve job. I'm assuming that the check engine light is not on. although wireharness issues are another common issue. these early C.A.N. cars are very difficult to troubleshoot electronically and the information provided by the factory is difficult to follow.

SOURCE: my 1995 mercedes S500 idles rough, and no power.

I had a similar problem with my 1994 S420.
Before taking it to the shop check the following:
Distributor covers, Rotors and Spark Plugs. That's what my car needed. Before I did it two "specialized" MB mechanics wanted to replace the engine wiring harness ($1,000.00) and the other wanted to replace Air mass sensor, throttle valve actuator ($2,000.00) I hope that's all you need.

Testimonial: "You hit it on the head. Had same problem with my '95 S500. diagnosed as bad fuel rotors. Explained to me there is one per cylinder, and were all origi"

SOURCE: where can i download free manual of mercedes c180

i need a gearbox

SOURCE: my mercedes 300e 2.8 has a rough idle whenever i

This is actually a common problem on this car. clean the IDLE air control valve with carb cleaner. Its located under the air filter assy. The problem is that the Idle control valve sticks.
I have successfully cleaned them in the past but sometimes they just need to be replaced.