* Call appears to be concession to secular opposition
* Opposition wants transitional parliament dissolved
* President cites Egypt in need for dialogue and stability (Adds German minister's visit, president's comment)
By Tarek Amara
TUNIS, Aug 14 (Reuters) - The secretary general of Tunisia's ruling Islamist party said on Wednesday that he favoured a non-partisan cabinet, in what may be a significant concession to the secular opposition after weeks of anti-government unrest.
Tens of thousands rallied on Tuesday in downtown Tunis in an escalation of protests since the July 25 assassination of opposition figure Mohammad Brahmi, the second such killing this year. Radical Islamists were blamed for both attacks.
"We need to form a non-political government to lead the country to elections within six months," said Hamadi Jebali, the second-ranking leader of the moderate Islamist Ennahda party.
The opposition is angry about the two assassinations and has been emboldened by the Egyptian military's removal of President Mohamed Mursi last month after mass protests against his perceived attempts to entrench Islamist control of the state.
Jebali's gesture appeared to depart from Ennahda's standing rejection of opposition demands for the dismissal of Prime Minister Ali Larayedh. But the final word rests with party chairman Rached Ghannouchi, who has not commented.
Jebali also called for the Constituent Assembly to complete drafting a constitution and electoral law in a few weeks to help defuse Tunisia's worst political crisis since secular autocrat Zine el-Abidine Ben Ali fell to a popular uprising in 2011.
The instability has worsened as jihadi militants step up attacks.
Ghannouchi was later due to meet Hussein Abassi, the head of Tunisia's powerful UGTT union federation, which has good relations with opposition parties, to discuss ways to end the political crisis. It would be the second such meeting this week.
Hamma Hammami, a senior figure in the Salvation Front, which groups more than 10 secular opposition parties, said the opposition would only negotiate with Ennahda after the dissolution of the Islamist-led government.
The Salvation Front called on Wednesday for a campaign to dismiss all Islamist governors appointed by the Ennahda-led government, and said it would continue to mobilise efforts to topple the country's Islamist rulers.
Ghannouchi told Reuters last week that his party was open to dialogue with secular opponents but that removing the prime minister was out of the question.
The opposition wants to dissolve the transitional parliament that has been drafting the new constitution and electoral law, fearing that it will cement Islamist domination in a country traditionally one of the most secular in the Arab world.
Secularists aim to announce an alternative "salvation government" next week, suggesting little prospect of compromise.
The head of the transitional parliament, a member of a secular party in the unsteady government coalition, suspended the legislature a week ago in protest at a lack of meaningful talks between Ennahda and the opposition.
FEAR OF "EGYPTIAN SCENARIO"
German Foreign Minister Guido Westerwelle began a two-day visit to Tunisia on Wednesday, the first visit of a senior European official since the crisis erupted three weeks ago
Westerwelle will attempt to convince the two camps to begin talks on ending the impasse, which has dealt a severe blow to an already crippled economy. He will be meet the president and prime minister, as well as the opposition and the UGTT leader.
Western powers fear that a protracted crisis could tip over into violence, even if Tunisia's army, unlike Egypt's, is unlikely to intervene.
Scores of Egyptians were killed on Wednesday when security forces moved in on protesters demanding the reinstatement of Mursi, and the government imposed a state of emergency as violence swept the most populous Arab nation.
The Egyptian military deposed and detained the freely elected Mursi on July 3 after mass anti-Muslim Brotherhood protests.
Unlike in Egypt, where the army helped protesters oust President Hosni Mubarak in 2011, Tunisia's armed forces do not have a large, lucrative stake in the economy and have not traditionally intervened in politics. Few observers expect Tunisia's military to step in to resolve the current crisis.
But Tunisia's president, Moncef Marzouki, warned that events in Egypt should serve as an example to Tunisia's politicians to intensify their dialogue.
The Ministry of Religious Affairs said Tunisians should draw a lesson from the events in Egypt to maintain security and stability. (Editing by Alison Williams)