If you really think the timing chain is going, don't wait! Mine broke and the resulting repair cost $2200. Two different places said it would have been less than $400 to replace the chain before it broke.

Here's what I spent on the 190 in 3 years, going from 85K to 135K miles:
A/C compressor $1100
Alternator $200
Brakes $200
Tires $300
Center resonator $150
Power window switch $45
Power seat switch $80
Antenna mast $25
Timing chain / valve job $2200

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Rick Miley
Tampa, FL
86 190E
87 300E