Just to add my $.02 about the 201.034 16vlv's. I had a bad hose in mine that had a refridgerant leak. The manifold a/c hose is a common defect in these cars. The replacement hoses can be extremely expensive to replace.
1994 E500 (MY SUNDAY DRIVER)
1993 190E SPORTLINE LE W/ M104 SWAP
2000 BMW 528I (WIFEY'S CAR)
"Excuses are crutches for the unfounded."