Guenther Steiner says he is "still not over" the first-lap collision at the British Grand Prix that eliminated both of the Haas drivers.
Haas split car specifications at Silverstone in a bid to understand its race troubles in 2019, but its prospects were derailed by a first lap clash between Romain Grosjean and Kevin Magnussen.
Both drivers suffered damage and returned to the pits for repairs, though retired shortly after, denying Haas the opportunity to compare the VF-19 specs in race trim.
It left Haas down in ninth place in the Constructors’ Championship, with Steiner furious post-race.
When asked to reflect on the situation as Formula 1 reconvened at Hockenheim on Thursday, Steiner said: "We need to see what we have done.
"We haven’t done anything yet but I think they got the message pretty clear after the race in Silverstone, so let’s see.
"I’m still not over it, because you have got a certain amount of opportunities, and obviously this year we are struggling in some of the races.
"I think they need to understand where we are. That’s the disappointing thing for me.
"They don’t let me down as a person, they let the team down which is disappointing.
"Like I say I’m still not over it. Normally I get over things pretty quick, but this one, because we had a clear talk after Barcelona about what to do and what not to do, and it wasn’t followed, which is disappointing."
On Haas’ driver line-up moving forward, and into 2020, Steiner said: "After the break we will know everything about drivers.
"And again, in Spa, you [the media] will all be lining up, asking what we do about drivers and then I will tell you we are almost there, but give me a few more days, a few more events and I will tell you!"
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