Technical modifications Engine 120 Mechanical II - RA0500120TA00X
WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.
05 Engine timing, valves
| Designation | Nature and reason for modification | Production breakpoints | Op. no. |
|---|---|---|---|
| Dowel sleeves of camshaft bearing caps | Elimination of dowel sleeves and holes in camshaft bearing caps and cylinder head | 01/93 | 05-2200 |
| Camshaft adjuster | Control plunger with inner dia. 7 mm bore (was 5 mm) Flange shaft with inclined dia. 5.4 mm bore (was 4 mm) Inlet camshaft with inclined dia. 5.5 mm bore (was 4 mm) | 03/93 | 05-2160 05-2170 |
| Bracket of distributor rotor to camshaft | Attached with torx 40 bolt+washer (was torx 30) | 05/93 | 01-2120 |
| Valve spring and valve spring retainer | Valve spring modified to volute spring (was conical valve spring). Top and bottom valve spring retainers adapted. Reason: reduced friction | 10/93 | 05-2500 |
| Valve guides | Valve guides made of centered metal | Phased-in 1993 | |
| Exhaust camshaft | Without stud for distributor rotor | 04.95 | |
| Bucket tappets | Weight-reduced; may only be fitted with volute-shaped valve springs | 04.95 | |
| Exhaust camshaft gear | With segments for camshaft position sensor | 04.95 |