Hallo guys, this is my first message, and I will do a little presentation.
I am Sergio, I am an Spanish guy and I live in Austria currently. I bought my Jag XF 3.0d 275cv last year, and when it works perfectly is the best car that I have had, but, that only happen two times haha.

Ok, lets go!

My car, has some problems like, when you accelerate it, appear the Restricted Performance, and when it does not appear, you can not accelerate fast until 2800 rpm, and when you are stopped in a traffic light, the car is going up and down with the rpm by itself, also when you use the Reverse, but if you are in N, disappear, and when you have activated the RP, that never happen, so I guess the problem is with the left turbo. I have changed the MAF sensor, but I did not feel any changes. When I use a diagnose tool, apear this:

P1247-00 Turbocharger boost preassure low
P004d-77 Turbo/supercharger boost control solenoid B - circuit high

In this case, I have another solenoid from a friend, and I have tried it (7.02428.00 Pierburg) , now my car in N has no the problem with the rpm, but sometimes in Reverse.
The car is not better, so now I have different codes:

P0235-94 Circuit of sensor A from turbo
P1247-00 Turbocharger boost preassure low
P00BD-07 Mass or volume air flow A circuit range/performance - air flow too high

I was looking the vacuum line, and al the hoses, are visually fine, so now I will try to change the another solenoid (7.22687.27 Pierburg) and I do not really know what to do.
Sometimes as 1 of 20, the car works perfect, although the turbos are not syncronized, you can feel all the power of this engine, so I am sure is not a problem with the turbo, but I think is a solenoid, hose or actuator.

What do you think guys?
Thank you in advance. (I hope my English is fine)