You're right.
Infineon has good products for automotive market.
Unfortunately, the range of products is poor and especially they have not small microcontrollers.

Just to clarify my situation, here under will explain you why I'm looking for good range of products :
My compagny is specialist of current sensors. I'm working in the automotive department and the market requires some "smart" sensors where microcontrollers are needed. However, we have several products in design and some of them have just to acquire a signal and send it using a serial communication or PWM. A very cheap 8 pin microcontroller is required there.
An other project on I'm working on requires to acquire several physical parameters, control an ASIC, class2 communication bus, a few signal processing and so on...
It will require a bigger microcontroller.
This is why I'm looking for a manufacturer and products able to fit all our requirements for many projects. We wouldn't like to use several manufacturer and toolchains. Waste of time and money...

As it's for automotive market, quantities are million parts. Final target cost is less than a few dollars (or euros) and electronic parts are not the most of the cost. Magnetic circuits and mechanics are very expensive there. We're designing an ASIC to reduce cost by integrating some discret parts of the device. So using an internal ADC is definitively not negotiable due to cost and size.

The criterions are to find products covering :
- FLASH from 1 to 64Kb
- RAM from 128 to 2048b
- EEPROM if possible or using FLASH for calibration storage
- 4 channel ADC 10 bits
- a few I/O
- temperature from -40 to +85 and devices available up to +105°C
- If possible a 10bits PWM

To cover the range I would like to have 3 or 5 chips :
- small,mean and bigger chip
or
- small, quite small, mean, quite bigger and bigger chip.

Thus, we'll able to design using a big chip and then to downward to a smaller chip fitting the requirements.
And we'll cover for the moment all our projects requirements with same range of product, same manufacturer, same toolchain.


I hope it will explain a little more my criterions for choosing microcontroller.
And believe me, designing products including molded housing, magnetic circuit, connector, electronic, asic and microcontroller for less than 5$ is not so easy even if there is million parts.

Regards
Stephane