My 103 suddenly stopped pegging the gauge and will only make about 2.5 bar when warm. Anyone else had this problem and any ideas as to
the cause appreciated. Getting a tick at idle that sounds like a lifter or worn rocker / cam lobe that gets louder on acceleration. Thanks in advance.

This might be a clogged filter. It has a bypass valve.

__________________
600SEL '91
300E 4Matic '88
240D '83
280SE '77
350SE '73
The most complex systems can fail in the simplest way.
Contra verbosus noli contendere verbis, sermo datur cunctis, animi sapientia paucis.

i don't believe in the lord! He's never bought me a Mercedes Benz.

Daddi,
Many thanks. That was the problem, a newly replaced Mann oil filter, perhaps an internal defect. Put on a new one and the needle pegs again like it should.
Best regards,
another Danish guy....