Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Mercedes-Benz W110
Table title:
Models
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Chassis code </th><th colspan=1 rowspan=1 > Years </th><th colspan=1 rowspan=1 > Model </th><th colspan=1 rowspan=1 > Engine </th><th colspan=1 rowspan=1 > Number built </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > W110.010 </td><td colspan=1 rowspan=1 > 1961–1965 </td><td colspan=1 rowspan=1 > 190c </td><td class="highlighted"  colspan=1 rowspan=1 > 1.9 L M121 I4 </td><td colspan=1 rowspan=1 > 130,554 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > W110.110 </td><td colspan=1 rowspan=1 > 1961–1965 </td><td colspan=1 rowspan=1 > 190Dc </td><td class="highlighted"  colspan=1 rowspan=1 > 2.0 L OM621 Diesel I4 </td><td colspan=1 rowspan=1 > 225,645 </td></tr>
</table>
Question:
What engines were available in the Mercedes W110?
Answer:
The Mercedes W110 series was available in 1.9 L M121 and 2.0 L OM621 diesel inline-four.