The 1986/87 cars suffered from the over-engineered emission systems, high failure Trap-oxydizer. If the engine over heats the Aluminum head can crack!!(temp gauge is standard equiptment)! Also the car has low coolant lamp! 1990 + later engines seem like they are somewhat more fragile, oil consumption & bent rods. Nobody is perfect.

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MERCEDES BENZ MASTER GUILD TECHNICIAN
ASE MASTER TECHNICIAN
27 YEARS M.B. TECH