I've got a 124 I'll be selling this Spring. While everything in the drive train feels fine, there is an intermittent (more so when cold outside) center support bearing whine. I'd really like to avoid paying to have this repaired (close to $300)....and it's not something I feel comfortable doing myself.

Has anyone found any ways to address bearing whine by way of a short term fix? Like injecting grease? Or whacking with a rock?

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 160k miles
06 E320 CDI "Rutherford", Black on Tan, 180k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 79k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife