I can sympathize with you as well..I recently spent $1700 just replacing electronics and fully servicing my w210 tranny. Runs and shifts perfect and its still original for the most part. I hope it holds a while. I hear a w210 can be $4-5 grand for rebuilds and $7 grand for new.

I miss my cheaper w124 big time!!!!! and mostly for its heated seats it had! But I do love this cold a/c in my w210

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Current stable......
17' Rogue SV 70k
11’ Saab 9-5 NG 94k
10’ e550 4matic 185k

sold
02' e320 210k
00' e430 167k
01' e320 171k (regret sale)
91' 300d 2.5t 300k (sold to ecoofidaho)
79' 240d 177k (old yellow my avatar)
87' 300d 169k (junk but fast)
85' 300tdt 261k (RBM parts delivery)
85' 300dt 68k (one owner cream puff)
82' 240d 250k
84' 300dt 198k (sold to diesel don)
91' 190e 2.3 61k
88' 260e 140k