Klien fastest in final practice - Germany

Klien, 23, who is fighting for his Formula One future, set the pace with a lap of 1:15.628 with four minutes of the session remaining, two hundredths of a second quicker than Honda's Jenson Button.

Button's Brazilian teammate Rubens Barrichello completed a great session for Honda with third, ahead of his countryman Felipe Massa's Ferrari, David Coulthard's Red Bull and Giancarlo Fisichella's Renault.

Of those expected to compete for pole position, Kimi Raikkonen was eighth for McLaren, local hero Michael Schumacher was ninth for Ferrari, while defending world champion Fernando Alonso, who celebrates his 25th birthday today, was 11th for Renault.

Schumacher was on course to set the fastest time of the session in the dying seconds before being forced to lift off due to yellow flags flown for a heavy crash for Japanese Sakon Yamamoto, who is making his race debut for Super Aguri this weekend, at the final corner.

Mark Webber was pushing hard after completing only six laps on Friday - too hard as it turned out, as he had a spin at the hairpin. He recovered without any damage to his Williams.

But the unluckiest man of the morning though was Jarno Trulli. The Italian Toyota driver's wretched season of unreliability continued when his car stopped on the circuit after turn two with smoke bellowing out of the engine bay.

With an engine change almost certainly needed, Trulli is set to drop 10 places down from his qualifying position on the grid.

It was Toyota's second powerplant failure of the weekend after the customer unit in Dutchman Christijan Albers' Midland gave way on Friday.

Pos  Driver        Team                     Time              Laps
 1.  Klien         Red Bull-Ferrari    (M)  1:15.628           14
 2.  Button        Honda               (M)  1:15.651 + 0.023   15
 3.  Barrichello   Honda               (M)  1:15.963 + 0.335   19
 4.  Massa         Ferrari             (B)  1:15.977 + 0.349   13
 5.  Coulthard     Red Bull-Ferrari    (M)  1:16.080 + 0.452   14
 6.  Fisichella    Renault             (M)  1:16.130 + 0.502   16
 7.  Heidfeld      BMW-Sauber          (M)  1:16.167 + 0.539   14
 8.  Raikkonen     McLaren-Mercedes    (M)  1:16.218 + 0.590   12
 9.  M.Schumacher  Ferrari             (B)  1:16.307 + 0.679   11
10.  de la Rosa    McLaren-Mercedes    (M)  1:16.322 + 0.694   12
11.  Alonso        Renault             (M)  1:16.427 + 0.799   15
12.  Liuzzi        Toro Rosso-Cosworth (M)  1:16.532 + 0.904   18
13.  Speed         Toro Rosso-Cosworth (M)  1:16.600 + 0.972   17
14.  Rosberg       Williams-Cosworth   (B)  1:16.690 + 1.062   20
15.  Webber        Williams-Cosworth   (B)  1:16.834 + 1.206   16
16.  R.Schumacher  Toyota              (B)  1:17.419 + 1.791   17
17.  Villeneuve    BMW-Sauber          (M)  1:17.740 + 2.112   16
18.  Monteiro      MF1-Toyota          (B)  1:17.793 + 2.165   23
19.  Yamamoto      Super Aguri-Honda   (B)  1:18.643 + 3.015   19
20.  Sato          Super Aguri-Honda   (B)  1:18.668 + 3.040   21
21.  Albers        MF1-Toyota          (B)  1:19.254 + 3.626   15
22.  Trulli        Toyota              (B)  No time             2

All timing unofficial