Been having a slight pull in the front end of my 123. Got all hyped up about alignment, tires etc etc. Turns out to be nothing more than a pressure imbalance in the tires. I run the car around 37 in the rear, 35 in the front. One front tire was reading just below 30. Got it back to 35 and checked the rest. All is fine now, nice straight tracking on the highway. Might be more sensitive due to high pressure being run but the car definitely has a much crisper feeling at this pressure level. Just an FYI.