The organising body of the DTM [the DMSB] has admitted it has found discrepancies between the data collected from its own GPS service provider and that of Audi, following a controversial drive-through penalty handed to Edoardo Mortara in the first Zandvoort race.

Mortara and his Team Abt Sportsline team mate Nico Muller were both adjudged to have 'failed to manage the slow zone' in Saturday's opening race after Augusto Farfus' retirement triggered a brief 80 km/h restriction through the first sector.

Both driver's received a drive-through penalty but Mortara was adamant of his innocence following the debacle, stating his team had the data to back up his claims.

Mortara was hit hardest by the penalty as the Italian dropped from sixth to 17th, losing vital championship points in the process.

Since the incident, the DMSB released the following the statement: "During the race, we have to be able to rely on the technical systems made available to us," said the spokesman for race control at Zandvoort, Michael Kramp.

"When the system is reporting that somebody is speeding, an immediate penalty is inevitable. Therefore, race control will refrain from using the GPS data to control the slow zones until the situation has been fully clarified.

"When a slow zone would be necessary during the race, any speeding infringements will only be analysed and penalised after the race."

With there being next to no possibility of reversing the said drive-through penalty, Abt Sportsline's Team Director, Hans-Jurgen Abt hopes the loss of those eight-points for Mortara won't come back to bite them later in the year.

Mortara recovered in race two to finish on the podium behind Jamie Green and Gary Paffett.

"With Edo (Mortara) we've stayed in contention in the championship although, obviously, we're disappointed about the loss of points on Saturday," said Abt.

"I hope that we're not going to be lacking these points in the end - especially since the competition in the DTM is so close this year.