Following the example of 97B4TDi, yesterday I took advantage of our January micro-thaw and rotated my tires and washed my DD, now at 346,800 miles. The all season General Altimax RT43 tires were installed in July 2016, shortly after I had a local shop install the LF tie rod assembly. I had put 21,000 miles on these sneakers, never rotated them and was starting to get a very unwelcome steering wheel shimmy at speed. I've got a nice stable steering wheel now. Also, I wanted to keep my back up plan B4 in the commuting mix through the winter, so I removed the 6 spoke rims with mounted Kumho Solus KH16 tires. I then installed stock steel rims with 4 new Yokohama IG52C Ice Guard studless winter tires that I bought from Discount Tires direct via eBay. WalMart mounted and balanced the tires for the carry in price.
The recent CEL issue on my DD is resolved. While troubleshooting, when I first hooked up my laptop computer to my B4, with the VAG-COM software, I only had a Glow Plug Monitoring- intermittent fault. At the same time, when it was routinely below zero every day here in NH, I was starting to get a slow speed shudder, whether the engine was warmed up or not. After I installed the new glow plug harness, I still had a CEL, and told my tale of woe here. Many of you suggested possible Orb of Death wiring and connection failures. I chose not to go there. Thinking that the slow speed shudder was a fuel delivery issue, I subsequently performed a Liqui Moly diesel purge and installed a new Mann WK842/4 fuel filter with no improvement. Next, I suspected my N75 wastegate solenoid was the culprit so I replaced it and still had slow speed shudder with CEL. I finally located my thinking cap, attached it firmly to my head, braved the cold garage and reconnected my laptop to let the VAG-COM software identify the CEL and slow speed shudder villain as Mass Air Flow Sensor G70. I first removed and cleaned the MAF sensor with some CRC brand MAF cleaner, re-installed the MAF sensor and my CEL vanished. Subsequently, I did install a new Mann C31 152/1 air intake filter and a new MAF sensor: 074 906 461; Pierburg # 7.18221.51.0 to ensure no future worries here. Jeff