Lewis Hamilton was left kicking his heels on the sidelines on his debut for Mercedes as the team's test of disaster continued.
On the opening day of the pre-season test at the Circuito de Jerez, Nico Rosberg managed just 14 laps before an electrical fault caused a small fire, which required a replacement of the wiring loom.
Taking up the reins from Rosberg on Wednesday on his maiden outing for the Brackley-based team, Hamilton would naturally have stepped into the cockpit of the W04 hoping for a much smoother ride. But the 28-year-old, who quit McLaren at the end of last season and signed a three-year deal with Mercedes, was also left a spectactor for the remainder of the day less than two hours into the session.
Hamilton's car suffered a rear-brake failure, later traced to the hydraulic brake line connecting to the right-rear caliper. It resulted in the 28-year-old locking up at the turn-six hairpin known as 'Dry Sack' at 170mph before ploughing through a wide expanse of gravel and eventually pushing his front wing into a tyre barrier.
It was clear at the time the fault lay with the car and not the driver given the skid marks on the asphalt on approach to the corner, and the fact Hamilton's car simply careered straight on for 70 metres before hitting the tyres.
Hamilton emerged unscathed, looking on whilst the 'jonah' car was recovered from the barrier, covered with a black tarpaulin, craned on to the back of a flatbed truck and taken back to the garage.
In announcing the brake failure, the team also confirmed the impact with the barrier had damaged the front-left corner of the car, notably the suspension and associated aero parts.
At that stage there was still a possibility of Hamilton returning to the track, but with just over three hours of the session remaining the team confirmed a second consecutive curtailed day.
Via their Twitter feed, Mercedes said: "We will not run again today as work continues with the repairs required on the car."
It is almost certain a lengthy inquest will now be undertaken inside Mercedes as they look to eradicate the gremlins over the final two days, with Rosberg back in the car on Thursday and Hamilton on Friday.