so here goes

I have a C230 1997 200K bought it last January
very nice car, fun to drive

last month it start it to act up ( you give it gas it revs and then it accelarates or it gives small "shots" aka "bucking")

Brought it to the dealer they took the codes and told me i have a broken spark plug change all 4 of them didn't took it for a test drive.. take it back home 1/2 from the dealer is doing it again...

Brought to the dealer again he said that it has a CEL on the transmision erro 114 ??

I asked them to try a new MAM he said that he doesn't have it in stock and that my transmission is gone and that i need one...

I have dificulty believing that my tranny felt just like that, the symptoms occur in D, 4 or 3rd gear...

Should i get my car away from the dealer ?
Should i try a new MAM ?

PLS HELP ME

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2001 Jetta TDI .205 injectors + Upsolute "Fast car"
1983 MB 300 SD "Ze Panzer" SOLD
1997 MB 230 C