One thing that Mr. Spencer fails to mention is that with the new chassis and engine, most problems mean take it to a dealer or a high-end independent. All the diagnostics are OBD1 and OBD2, which means you need a code reader or computer program.

The worst things that can happen to a 107 like the ACC going south are chump change compared to a 129. The M129 also suffers from a variety of afflictions like blown-out oil tubes. It has eight coils at like $75 apiece, and the injectors are over $300 each. Pre-1996 cars suffer the dreaded biodegradable wiring harness problem, a $1500 repair.

I am learning about this stuff with my S500 coupe. I am blogging on the Vintage Forum,

Notes from beyond the Dark Side

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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe