Simon wrote: Thu Sep 18, 2025 11:33 am
Locking wheels replaced with normal nuts on the Yeti, following my thread a few weeks ago. It's not worth risking a problem with the key failing TBH so glad they're gone.
Merc battery replaced with a like for like Varta from Tayna. Exceptional service as expected. Ordered yesterday, arrives this morning. Fitted already with help from my boy, and BMS reset with my £20 KDiag From AliExpress Total spend £150 as opposed to the £450 that Mercedes wanted to supply and fit. Total job was about 45 minutes including a little test drive. The Stop/Start worked straight away as that's been effectively disabled for years as the old battery was knackered.
Thought I'd update this.
Later in the day I got a push alert and email on my phone that my car battery was low. Thought nothing of it and that it was probably just a delayed report from the old battery.
The next morning about 24 hours after fitting the car alarm went off. Couldn't get in to the car with the fob, and when I did manually nothing worked at all. Tested the new battery and it was showing just 6 volts. Tried to charge it on my CTEK and it wouldn't take a charge. Checked for parasitic drain in the car and it pass fine so clearly not an issue with the car and likely a dead cell or two in the new battery. Tayna collected it the next working day, tested it and confirmed it dead (refunded).
So I ordered a replacement from them again (oddly cheaper this time) and fitted it yesterday and it's been fine since then. A very rare case of a dead new battery, but Tayna handled it well regardless.