Experience PT Cruiser Diesel

Hello, since last Sunday my Mercedes unfortunately failed the service, I now have to get a new car. So I came across the PT Cruiser. Does anyone have experience with the diesel variants here? I currently drive about 30,000 KM per year and need a reliable inexpensive companion with cruise control. I found the following model: PT Cruiser 2.2 CRD According to various offers partly with 121 and with 150 hp, are these different chip settings, or different motors ? Is a consumption with 7.5L realistic, what do you consume with the car? I had with my E220 CDI, is possibly the same engine, repeatedly problems with the diesel injectors, have these problems already occurred with you? What else can be said about the reliability? Electronic problems were unfortunately common with my Mercedes, what does it look like here?