Mercedes Prospeed Specialist

I've gone to Arnold for years, and have overall disliked him. I'm not sure what kind of customers he is willing to work for, but I have never gotten him to do anything for me. I paid him UP FRONT to do a simple repair on my car, and it sat in front of his shop for a year and he still didn't do it. I then took it back and did the repair myself (in 20 minutes). Since then I have bought a couple parts from him, and it really doesn't matter how long you've been his customer, he's always ready to take your life savings. When he can find the part within a couple minutes, he'll sell it to you, albeit for too much. But most of the time he'll say in a rude, impatient and dismissive tone, that he'll call you when he finds it. Of course he will not do this, and you'll just have to keep stopping by to hound him, get treated rudely every time. Last time I went to check if he found the part yet he didn't even look at me, just said "I don't have it I'm still looking", and got in his car and drove off. Another instance of his rudeness and dishonesty was when I asked if I could buy a car from him. It was in his yard of parts-cars but I was prepared to make a generous offer. He told me that "that one is a customer's I'm fixing it for him", and then about a month later I check and the car is totally parted out. I've always paid up front or had cash in hand, been extremely patient and polite and he still won't do anything for me and treats me like crap. I wouldn't recommend Prospeed if you have any self-respect.