Maruti Udyog (MUL) is planning an across-the-board increase in prices from April 1 due to the hike in steel prices following this year's budget proposals.According to offficial sources, the proposed raise would be in addition to the new pricing announced by the company for switching to Euro III emission norms in 11 cities and Euro II norms in other parts of the country as per the new auto fuel policy."There has been a sharp increase in steel prices after the budget, and the company needs to cover additional costs through higher prices," sources said, adding the quantum of increase would be decided soon.