Partner tepee

Hello friends. I just joined the forum. I read most of the topics with pleasure. I learned a lot thanks to you :)
I have Partner Tepee 2010. I just bought. Actually I have a few questions in my head.
1-I use the tool constantly because of my job. What would be your gear and speed suggestion to be economical for the long way?
2-While the vehicle was in motion, there was a voice called "click". (2nd gear speed 30 beats) then the gear is disabled. the car is running. clutch also works. car shifts into gear. however, when he lifts his foot from the clutch, he does not transfer it as if it is idle. They do service for warranty coverage. they said the car was either skidded or the gear shifted to a higher gear. therefore it has taken the motor protection. there is no such situation. Does anyone know a more logical reason for this?
3-How the friend before me used it !! cd stuck in the player. We sent from the warranty. came back. They did. but there is a note on it. In order not to insert original CDs. Now in this case, mp3 is not a problem or if I prepare and install the track myself, the same problem. I don't really want to experience the same problem again.
4- It has 20% fuel saving fuel additive. Does anyone use it really work?
Let me not ask any more questions for now :) (I am like that.
thanks in advance.

3- If your tape does not have mp3 player feature, your mp3 full cd will not work as it is. The CDs you will prepare as Track will work, but do not forget to write at the lowest speed while preparing the CD.

Thank you.

I guess your vehicle is good, obviously there is no trip computer. Something that everyone knows is the 5th gear fixed 90km / h. But if your last gear is short, it can be good at 80. Or we can not understand without experiencing them if the vehicle is at full turbo spool at 90kmh.

no fuel additive saves 20%
Let's say your vehicle burns at least 6 liters of fuel at a maximum speed, that is, the 5th gear at a constant speed of 90 km.
no additive will make your vehicle (6000 cc 20% 1200 cc minus 4800 cc) burn 4.8 liters
it only improves the combustion quality of the fuel and gives the engine an extra 5% power so that you can make the gear changes more rapidly. you reach gear in 5th gear, you travel at a lower speed, which does not exceed 5% in saving

@Tugrahan I can not pass without saying thank you very well.

First of all, thank you very much. I don't expect 20% fuel saving anyway. I just wondered if anybody has any knowledge of savings rate or performance. The general thing is actually 5 gears 90. I just wanted to make sure that there could be a different situation in these vehicles. Thank you again.

Hi all, hello everyone, good luck my teacher, the click sound coming from the vehicle is due to the engine protection of the vehicle.