Audi driver Lucas di Grassi held the top spot for much of the 30-minute FP2 session – where all drivers except Nick Heidfeld improved their best times from Saturday’s earlier 45-minute FP1 running.

As FP2 entered the closing stages, most drivers went for a second full-power lap on 200kW, with Rosenqvist deposing di Grassi at the top of times. 

But Vergne, who had flirted with the barrier at the exit of the high-speed Turn 7 left-hander earlier in the session, swept around the Tempelhof Airport track to set a best time of 1m09.438s. 

The put him 0.095s clear of Rosenqvist, who is third in the title standings 61 adrift of Vergne.

Vergne’s Techeetah teammate Andre Lotterer leapt up the order to grab third place in the overall practice times with a late improvement. 

Reigning champion di Grassi ended up fourth, 0.146s behind Vergne, with 2015/16 title winner Sebastien Buemi sixth for Renault e.dams.

Audi’s home driver Daniel Abt was sixth, with Jerome d’Ambrosio seventh for Dragon.

Heidfeld topped the times in FP1 with his lap of 1m09.697s, which put him eighth in the combined order after FP2, where he was 12th fastest.

DS Virgin's Alex Lynn and Jaguar’s Mitch Evans rounded out the top 10 ahead of Vergne's nearest title rival Sam Bird in the second DS Virgin car.

Tom Dillmann was 19th quickest in the combined practice times for Venturi as he replaces Edoardo Mortara, who is racing for Mercedes in DTM at the Lausitzring this weekend.

Stephane Sarrazin – replacing Tom Blomqvist at Andretti for the rest of the FE season – ended up 20th and last in the combined practice standings.

The veteran Frenchman caused a lengthy red flag in FP1 when he went into the barriers at the long, circular Turn 1 left-hander, a result of his throttle still being partially engaged when he hit the brakes for the corner.

Second practice results:

Pos.	#	Driver	Team	Time	Gap
1	25	Jean-Eric Vergne	Techeetah	1'09.438
2	19	Felix Rosenqvist	Mahindra Racing	1'09.533	0.095
3	18	Andre Lotterer	Techeetah	1'09.568	0.130
4	1	Lucas di Grassi	Team Abt	1'09.584	0.146
5	9	Sébastien Buemi	DAMS	1'09.606	0.168
6	66	Daniel Abt	Team Abt	1'09.636	0.198
7	7	Jérôme d'Ambrosio	Dragon Racing	1'09.682	0.244
8	36	Alex Lynn	Virgin Racing	1'09.883	0.445
9	20	Mitch Evans	Jaguar Racing	1'09.945	0.507
10	2	Sam Bird	Virgin Racing	1'09.946	0.508
11	16	Oliver Turvey	NIO Formula E Team	1'09.982	0.544
12	23	Nick Heidfeld	Mahindra Racing	1'10.037	0.599
13	3	Nelson Piquet Jr.	Jaguar Racing	1'10.132	0.694
14	5	Maro Engel	Venturi	1'10.332	0.894
15	6	Jose Maria Lopez	Dragon Racing	1'10.378	0.940
16	68	Luca Filippi	NIO Formula E Team	1'10.426	0.988
17	28	Antonio Felix da Costa	Andretti Autosport	1'10.434	0.996
18	8	Nicolas Prost	DAMS	1'10.450	1.012
19	4	Tom Dillmann	Venturi	1'10.456	1.018
20	27	Stéphane Sarrazin	Andretti Autosport	1'10.735	1.297