You need a 14MM Allen key or similar sump plug key.
To remove the drain plug for the differential on a 1990 Mercedes Benz 500SL, you typically need a 14mm hex (Allen) wrench or socket. It's advisable to check the condition of the plug and the surrounding area for corrosion before attempting to remove it. Using the correct size tool will help prevent stripping the plug. Always ensure the vehicle is safely supported before performing any maintenance.
The size wrench to remove it should be 15mm.
A washing machine should typically have a drain size of 2 inches to effectively remove water and prevent clogs.
13mm
Use a proper size box-end wrench or socket to remove the oil drain plug
It seems to me I use a 15 mm wrench to remove the engine oil drain plug.
14mm
15mm.
15mm
11/16th
To remove the timing cover on a 1999 Mercedes CLK430, first, disconnect the battery and drain the engine oil. Then, remove any accessories or components obstructing the timing cover, such as the serpentine belt and pulleys. Next, unbolt the timing cover using the appropriate socket size, being cautious of any hidden bolts. Finally, gently pry off the cover, ensuring not to damage the gasket or surrounding components.
I can't remember exactly but its big (for a drain plug) somewhere around 17 or 19mm.