Head of Mercedes-Benz Motorsport Toto Wolff has admitted his concerns over the Silver Arrows' poor starts after another issue at lights out in Hungary.
Having seen the two Williams cars fly past them at Silverstone earlier in July, Lewis Hamilton and Nico Rosberg's front-row lockout at the Hungaroring was cancelled out by Ferrari duo Kimi Raikkonen and Sebastian Vettel.
It was a forgettable race in Budapest for Mercedes, as they missed out on a podium altogether for the first time in 29 races.
Wolff says substandard starts are "not acceptable"
"Very," said Wolff, when asked by reporters whether he was worried about Mercedes' surprisingly bad day at the office.
The 43-year-old referred back to the British Grand Prix in which Hamilton and Rosberg were "jumped" by Williams, insisted Sunday's poor start triggered a "whole mess."
But Hamilton also had a problem with wheelspin at the lights in Austria, which allowed his team-mate to beat him on the inside and cruise out in front.
With the Hungarian Grand Prix having marked the last race for a month, Wolff is keen for his team to get to the bottom of the situation.
"It isn't acceptable," he said. "We need to analyse why that happens. It's [because of] many various reasons, it is not one in particular, but if you look at it – not good."
Wolff hoping change in starting procedures can help Mercedes' cause
Sunday's race in Budapest also marked the final weekend of the existing starting procedure, which will be overhauled for the next race in Belgium.
After complaints that cars are too heavily assisted by electronic software programmes, drivers and race engineers will now have to use manual getaways.
The current starting procedure sees race engineers and drivers select software settings, including an adjustment of the car's clutch bite point, but giving the drivers more control is expected to add more unpredictability and excitement from Spa onwards.
Wolff - who joked that the changes could prove beneficial for his team - admitted that Mercedes have perhaps been getting carried away by focusing on practising manual starts, which he called "Spa-starts."
"We have probably traded the future for the present. You should always live in your time - we've probably that experienced today [thinking too far ahead]," he said.
But he admits that regardless of the changes, Mercedes have suffered badly from "too much wheelspin" at the race.
"It is very difficult to get the calibration right," he said. "We had two very good practice starts off the line but when it mattered in the actual race start, we had too much wheelspin and then you get overtaken in a way you cannot recover."