I like my 1984 190D 2.2 N/A 5-speed. Absolutely rust free California car, everything works including A/C, cruise control and remote keyless entry. Engine is strong and is a fun little car. The W201 is over-engineered by historical standard and is well built. It is my half DD as the other half is a 300SDL. One thing I find is that the W201 styling is modem looking and no one can tell it is a 29+ years old car. Unlike the W123, which is a good car but is dated. Never try a turbo 190D 5-sp but I bet it will be more fun relative to mine.

__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.