Hello Have bought me a New Omega B. 2.0 16v 136 Ps Limo ,Automatic Bj:1995 210 Tkm Run New Getting 1 month ago head seal ,Zahnrimmen ,Water pump ,all hoses and and and ………. Have now only 2 problems laugh……First, the heating won’t be warm no matter whether I put cold or warm it does nothing. Also not a bit there comes only cold air ,the mechanic meant heat exchanger . How can it be tested exactly whether it is the heat exchanger ?. The 2 te problem is t in the stand shakes the whole body a little , I make D to drive in likes it worse.Habe hall vacuum hoses ,Rosselklappe ,Air meter idle control valve everything exchanged ohn success.